Vehicle disk brake
专利摘要:
A fluid pressure operated disc brake having one brake disc affixed to the housing of a brake cylinder unit and the other disc affixed to a service brake piston of the brake cylinder unit, which further includes an auxiliary brake piston between the service brake piston and cylinder head, thereby forming on opposite sides thereof a service brake actuating chamber and an auxiliary brake actuating chamber to which fluid pressure may be admitted via separate service and parking brake valve devices. A filling piece disposed between the brake cylinder housing and auxiliary piston is operatively connected with an actuating cylinder to which the parking brake valve also supplies auxiliary brake pressure to operate the filling piece following an auxiliary brake application, thereby mechanically locking-up the brake discs in the brake application condition to provide a parking brake. In the several embodiments of the invention, the filling piece takes the form of a ring member having an inclined surface that interacts with an inclined surface of the auxiliary piston upon actuation of the ring member, a cam acting against the auxiliary piston, and a ball or roller acting between inclined facing surfaces of the brake cylinder housing and auxiliary piston. Means associated with the filling piece and/or actuating cylinder permit unlimited adjustment of the filling piece in a direction to lock-up the brake discs in brake application position, but only allow limited retraction of the filling piece adjustment when releasing the parking brake to maintain a predetermined brake piston clearance irrespective of brake shoe wear. 公开号:SU976861A3 申请号:SU772534917 申请日:1977-10-14 公开日:1982-11-23 发明作者:Райнеке Эрих 申请人:Вабко Вестингхауз Гмбх (Фирма); IPC主号:
专利说明:
The blocking element is hingedly connected with a stopper valve in the compensator of the valve. The blocking element can be in popien and in the form of a cam mounted on a rotating axis. FIG. 1 shows a disk torloz section; in fig. 2 - compensator of the brake code with a locking device; in fig. 3 - option popopneg: {ha of the blocking element with the support with a round cross section; in fig. 4 another embodiment of the support; on . FIG. 5 shows an embodiment of a brake pad wear compensator; Fig. 10 b shows options for performing a disc brake. The disk brake includes a housing 1 of an annular disk feed cylinder, which, by means of support 2 of housing 1, is connected to a trunnion in such a way that it can perform only axial movements, a piston, 3 service torus, a piston 4, a hundred night brake and a blocking element 5, mounted in the housing 1, on the piston 4 one hundred night brakes are filled with 1 non-jagged surfaces in the form of teeth 6. These are the teeth. 6 interact with the locking element 5 in the form of a ring provided with additional inclined surfaces 7. The movements of the locking element 5 are transmitted to the working cylinder 8 of the wear compensator, in which the piston 10 with the piston rod 11 which is spring-loaded 9 is located, and the stopper 12, which serves to adjust the service brake piston clearance when the brake lining is worn and to limit the movement of the piston 1O in one direction only. The piston rod 11 is connected to the locking element 5 via a hinge 13. Brake rings 14 and 15 with friction pins 16 and 17 move freely in the axial direction in support 2. Friction linings 16 and 17 with the brake applied through piston 3 / interact with the supporting surface 18 and 19 of housing 1, on the one hand, and with rotating brake discs 20 and 21, on the other hand. The piston 4 of the hundred-night brake is prevented from scrolling by means of a rod 22 fixed in the housing. The pneumatic connection between the receiver 23 for compressed air and the working chamber 24 located between the two pistons 3 and 4 is carried out by means of a brake valve 25 and a branch pipe 26 in the housing 1, and between the second receiver 27 for compressed air and the working chamber 28 of the night brake placed on the other side of the piston 4 - by means of the valve 29 of the manual brake and the branch pipe 30 made in. housing 1. The chamber 31 of the working cylinder 8 through the pipe 32 is also connected to the valve 29 handbrake. In another embodiment, the annular blocking element 5 may be replaced by several parts of the insert 38 (Figs. 3 and 4). In this case, the wedge-shaped parts 33 are installed, for example, by means of springs 34 on support 35. Thus, at different stroke values of the service brake piston 4 due to different wear of the linings of one brake disc, the pressure of the brake linings is sub-carbonized so that after fitting the first parts of the wedge may be different, corresponding to the stroke, the movement of the clamp for the purpose of further compensation, with different stroke sizes being caused by different widths of the gaps 36 and 37 between the piston 4 and one hundred night brakes parts 33 with & CI .iJ. The support 35 is made in the form of an annular part displaceable in the annular gap, which has either a circular (phage 3) or rectangular (Fig. 4) cross section, and the wedge-shaped parts 35 of the insert have projections 38, which move in additionally formed grooves .39 of the support 35, and in this case the protrusions and grooves have a 0-cross section. The movement of the support 35 is caused by the actuation of the ball head 40 of the hinge 13, moving by means of the working cylinder 8 (Fig. 2). Bearing 35 is provided with, in addition, an emphasis; - mi 41, which can be made ring-shaped and serve for support. zhani distances of parts of 33 inserts, while releasing one hundred night brakes. The cylindrical body 42 of the disc brake variant can be connected to the semi-axis 44 by means of the body support 43 so as to perform only axial movements (Fig. 6). The operating brake piston 45, one hundred night brake piston 46 and a cam 48 in the form of a cam 48 are mounted in an ergonomic housing 42. The locking device consists of a working cylinder 49 located outside the housing 42, a piston 5O which is connected to gear 52 through its piston rod 51 a gear rail 53. In the front part of the working cylinder 49 there is a locking device 54, which allows the toothed rail 53 to have a limited backward movement towards the cam 48. This locking device 54 serves to adjust the piston clearance Static preparation when worn brake pads freak tional. The housings 55 and 56 located in the support 43 of the body can be axially displaced in the axial direction and rigidly connected to the friction linings 57 and 58, which by means of the piston 45 and the surface 59 adjoins the cylindrical body 42 to the brake disk 60. Pneumatic connection between the receiver 61 for compressed air and located between the two pistons 45 and 46 by the service brake chamber 62 is carried out by means of a brake valve 63 and the nozzle 64 of the cylindrical body 42, and between the second receiver 65 for compressed air and spacer On the other side of the piston 46, a camera 66 one hundred night brakes - through the valve 67 one hundred night brakes and pipe 68. Through pipe 69, the camera 70 of the working cylinder 49 is connected to the valve 67 of the hand brake. The spring 71 supports the piston rail 50 in the unlocked state, acting on the insert 72 and the inclined surfaces 73. A spring 74 is installed between the piston 45 and the piston 46. In FIG. 7 shows a disc brake brake discs 75 and 76 of which are connected by means of a screw 77 to the hub of the 78-wheel. The rigidly reinforced parts of the brake consist of brake jconen 79 and 8O fitted with friction linings 81 and 82. Brake rings 79 and 80 are rigidly fixed to the circumferential and freely suspended in the axial direction & ampli fi cation on the axle flange 84 by means of a bolt 85 The brake actuator consists of an annular cylinder located between the brake rings 79 and 80, consisting of two parts 86 and 87 of the annular cylinder and the piston 88 of the one hundred night night Topvioaa axially moving in it. The service brake chamber 89 located between the ring V dandrom 86 and the ring piston 88 is connected via a pipe 9O to the brake valve 91, and the camera 92 of the hundred night brake connected between the ring cylinder 87 and the ring piston 68 is connected via a pipe 93 to the manual brake valve 94. Between the conical surfaces of the piston 88 and the cylinder 87 there is an insert 95 in the form of a roller or a ball, which is under the influence of the spring 96 of the auxiliary piston 97. Located. on above piston 97 chamber 98 joints. on with a hand brake valve 94. The piston 97 has sloping surfaces 99. A variant of the disc brake design in FIG. 8 differs from that shown in FIG. 1-7 in that the locking element 100 is located in the bent cylinder 101, and the spring 102 interacts with a wedge-shaped insert (FIG. 5). The brake construction in FIG. 9 is similar to that shown in FIG. 7, but is dual, without service brake piston and clearance adjustment. The brake construction in FIG. 10 differs from that shown in FIG. 1 by the form of execution of the piston SW of the service brake and the piston 1О4 of a hundred night brake, interacting with wedge-shaped inserts 105 and springs 1O6. The disc brake shown in FIG. 1, works as follows. When the service brake is applied by activating the brake valve 25, the control pressure fills the working chamber 24 between the service brake piston 3 and the piston 4 of the hundred night brake, while the service piston 3 performs a compression movement and transfers it to the friction linings 16 and 17, the one-hundred-night top piston 4 rests against the locking element 5. The clearance between the two pistons 3 and 4 is controlled by the locking element 5. If the one-night brake installation is set by means of a manual brake valve 29 With compressed air, the control pressure fills the working frame 28 and the standing piston 4, seizing the service piston 3, transmits movement to the friction pads 16 and 17. If after stopping the vehicle the parking brake is to be activated, the manual brake valve 29 is given the corresponding position, And that chamber 31 of the working and cylinder 8 is relieved of pressure, which kept the piston 1O against the force of the spring 9 in the unlocked position. As a result of this, the hinge 13 connected to the irop by the spindle rod 11 transfers this movement to the latch blocking element 5 and presses the stepped inclined surfaces 7 onto the stepped inclined surfaces 6 of the piston 4 to the hundred-night Topviosa. The disc brake shown in FIG. 6, works as follows. With the load actuated by the brake valve 63, the regulating pressure fills the chamber 62 between the piston 45 of the working brake and the piston 46 of the one hundred night brake. While the service brake piston 45 performs a squeeze movement and transmits it via frictional 1-folds 57 and 58, the atomic brake piston 46 is unlocked on the locking element 47. The piston 45 clearance is obtained from the distance between both pistons 45 and 46 and is practically set by adjusting the position of the locking element 47 After stopping the vehicle, the handbrake valve 67 is loaded with compressed air, the control pressure fills chamber 66, and the standing brake piston. 46 b is driven along with the working piston 45, which, like during service braking, transfers the same {to the friction linings 57 and 58. If the brake is to be blocked, then the valve 67 of the manual brake is transferred to the appropriate position and through the valve 69 to the chamber 70 working cylinder 49 is pressurized. The piston 50 is set in the appropriate position, the spring of the spring 71. The toothed rail 53 transmits the movement of the piston 50 to the gear 52 and presses the insert 72 against the inclined surface 73 of the locking element 47. When the night brake is turned off, the constriction is reversed. With D.p. releasing the parking brake, the chamber 66 is blown by switching the manual brake valve 67 to the appropriate position. So that, without a corresponding pressure recovery in this chamber 66, the stopper 47 is released from the forces acting on it and the subsequent blowing of the working cylinder 49, those. his camera 70, removes the lock. The locking device 54 located in the front part of the working cylinder 49, the locking device 54 means that the stroke required for jamming or fixing a hundred night brake is free, however, when the jamming is removed, it only has a certain amount corresponding to the maximum stroke of the service brake piston 45 . When the one-night night is activated, the distance between the piston 46 and the service brake piston 45, even when worn out, is maintained by adjusting the piston 46 of the hundred-night brake approximately constant. Such a gap compensation occurs by limiting the retaining device 54 to the reverse. The trailed spring 74 is designed to compensate for the change in length caused by fluctuations in tempera. tours. The disc brake shown in FIG. 7, works as follows. When the brake valve 91 is actuated, the service brake chamber 89 is blown through the port 9O. The pressure increasing there on one side moves the brake cylinder 86 with the brake ring 79 and brake adjustment 82 towards the rotating brake disc 75, and on the other side acting in the opposite direction on the annular piston 88. the pressure causes it to move through the roller 95 to the annular cylinder 87, in such a way that its brake lining is fixed on brake ring 80, is adjacent to the rotating disk 76. When actuating the manual brake valve 94, through chamber 93 blows the camera 92 ary brakes. Pressure recovered there from one. side of the ring moves the ring por. 88 to the side of the inner surface of the ring cylinder 86 in such a way that it causes the actuation of the brakes described during working braking, and on the other hand moves the ring cylinder 87 with its brake ring 8O and the brake pad 81 in the direction of the other brake disc 76. Insertion, i.e. the roller 95 is freely located on the inclined surface 99 of the piston 97 of the hundred night brake, since the pressure induced in the chamber 98 through the valve 94 of the manual brake is relieved by the piston 97 against the tension of the spring 96 in one position that does not affect roller 95. Only after stopping the night brake to fix the night brake, the pressure in chamber 98 is reduced in such a way that spring 96 causes the piston 97 to move and moves vapik 9S by means of the inclined surfaces 99 of the piston .97 upwards in the direction n The wedge-shaped planes that are formed by the surfaces of the annular piston 88 and the annular cylinder 87 facing the camera 92. To turn off the one-hundred night brake, the camera 92 is blown by switching the parking brake panel to the appropriate position so that the insert 95 is released from the forces acting on it and blocking The operation of the disc brakes shown in Fig.8-1O would be eliminated, similar to the disc brakes shown in Fig.1-7. A feature of the disc brake shown in Fig. 8, with the brake pad compensator shown in Fig. 5, is that the movement of the blocking element 1OO occurs in the bent cylinder 101, and when the 100-night brake is turned on, the spring 1O2 pushes the wedge. the visible insert and the working cylinder case fixed on it to the blocking position. The disc brake feature shown in FIG. Yu, consists in the sequential activation of the piston SW of the service brake and the piston O4 hundred of the night brake. A piston stopping of a night brake occurs by means of three circumferentially distributed wedge-shaped inserts 1O5, on which, due to a lower regulating pressure in the radial direction outward, the force of the spring 1O6 is pressed. The application of the invention will ensure reliable and guaranteed stopping at the station. 9 10 61 Formula ia obrvtenn 1. A vehicle disc brake containing a cylindrical body, brake pads located in it. With friction linings, a drive for working and standing systems, pistons of which are installed in the working chambers and connected to brake pads, and a wear compensator friction linings with a locking device and at least one receiver connected to the working chamber with a working chamber, which is characterized by the fact that, with heightening of the braking reliability, it is equipped with a blocking element, n-nennym as inserts with pads mounted in the housing to contact an porschnem the parking and drive kinematically associated with a locking device compensator fee. 2. Brake according to claim 1, of which the blocking element is made composite. 3. Brake according to claim 1, characterized by the fact that the blocking element is designed as a ring. 4. Brake according to claim 1, characterized in that the blocking element is designed in the form of wedges located on a ring-shaped support with stops and wedge fixation springs one relative to another in circumferential direction. 5. A brake of POP1, characterized in that the blocking element is hingedly connected with a locking device of a wear compensator. 6. Brake pop. 1, I distinguish it by the fact that the blocking element is designed in the form of a cam mounted on a rotating axis. Sources of information taken into account in the examination 1. Application.-IRG № 251О193, cl. F 16 D 55/02, 1976 (prototype). J7 FIG. V
权利要求:
Claims (6) [1] Claim 1. A vehicle’s disc brake, comprising a cylindrical body, brake pads located therein and friction linings, a drive for the working and parking systems, pistons of which are installed in the working chambers and connected to the brake pads, as well as a friction liner wear compensator with a locking device and at least at least one receiver connected by a pipeline to the working chamber, o characterized by the fact that, in order to increase the reliability of braking, it is equipped with a blocking element made in the form of inserts with the fingers mounted in the housing with the possibility of contact with the piston of the parking drive and kinematically connected with the locking device of the wear compensator. [2] 2. Brake on π. 1, characterized in that the blocking element is made integral. [3] 3. The brake according to claim. ^ Characterized in that the blocking element is made in the form of a ring. [4] 4. Brake pop. 1, characterized in that the blocking element is made in the form of wedges located on an annular support with stops and springs for fixing the wedges relative to one another in the circumferential direction. [5] 5. Brake pop. 1, characterized in that the blocking element is pivotally connected to the locking device of the wear compensator. [6] 6. Brake pop.1, distinguished by the fact that the blocking element is made in the form of a cam mounted on a rotating axis.
类似技术:
公开号 | 公开日 | 专利标题 SU976861A3|1982-11-23|Vehicle disk brake US4256206A|1981-03-17|Disc brake US3835961A|1974-09-17|Disk type brake US3811538A|1974-05-21|Brake adjusters US3661230A|1972-05-09|Disc brake with actuating means and manually releasable adjusting means GB1451327A|1976-09-29|Brake actuator mechanisms provided with automatic slack adjusters US3236336A|1966-02-22|Means for actuating a friction pad in a disc brake US4055238A|1977-10-25|Anti-squeal device in disc brake US3701398A|1972-10-31|Fluid and mechanically actuated disc brake system US3966028A|1976-06-29|Automatic brake adjusting mechanism JP2001522441A|2001-11-13|Brake lining wear regulator assembly US4611691A|1986-09-16|Hydraulic actuator assemblies for vehicle brakes US3592299A|1971-07-13|Hydraulic disc brake actuator with a self-adjusting mechanism US6491138B1|2002-12-10|Disc brake US3651896A|1972-03-28|Hydraulic disk brake with mechanical actuator US3750853A|1973-08-07|Load transmitting struts US4050548A|1977-09-27|Automatic adjusters for hydraulically operated disc brakes KR19990028320A|1999-04-15|Disc brakes for motor vehicles GB1439758A|1976-06-16|Hydraulic brake actuators fitted with automatic slack adjusters US3734242A|1973-05-22|Annular, antipodal, relatively-separable brake US4284176A|1981-08-18|Mechanically operated disc brake US3576236A|1971-04-27|Tandem hydraulic brake actuator EP0227315B1|1990-01-31|Improvements relating to adjusters US3545578A|1970-12-08|Wear-compensating brake adjustment mechanism US3732952A|1973-05-15|Brake adjusters
同族专利:
公开号 | 公开日 CH627532A5|1982-01-15| JPS5352869A|1978-05-13| GB1590971A|1981-06-10| SE435090B|1984-09-03| SE7711190L|1978-04-17| CS218571B2|1983-02-25| FR2367948A1|1978-05-12| AT371576B|1983-07-11| FR2367948B1|1984-06-29| DE2646870A1|1978-04-20| IT1143837B|1986-10-22| JPS6261815B2|1987-12-23| US4116307A|1978-09-26| HU174874B|1980-03-28| ATA613377A|1982-11-15| NL7711317A|1978-04-18| DE2646870C2|1983-04-21|
引用文献:
公开号 | 申请日 | 公开日 | 申请人 | 专利标题 DE470888C|1929-02-01|Heinrich Nowigk|Braking device for motor vehicles| DE1302104B| US3223458A|1962-12-31|1965-12-14|Bendix Westinghouse Automotive|Brake mechanism| US3342290A|1964-12-22|1967-09-19|Klaue Hermann|Disk brake for automotive vehicle| US3425519A|1966-06-11|1969-02-04|Teves Kg Alfred|Disk-brake system including plural actuators| DE1291951B|1966-06-24|1969-04-03|Teves Gmbh Alfred|Partly lined disc brake| US3410610A|1966-07-08|1968-11-12|Rockwell Standard Company|Parking and emergency brake system for vehicle| DE1655313C3|1966-11-16|1974-01-24|Alfred Teves Gmbh, 6000 Fankfurt|Dual-circuit brake cylinders, in particular for disc brakes| US3472124A|1967-09-08|1969-10-14|Ellcon Nat|Braking apparatus| SE370992B|1968-11-14|1974-11-04|Girling Ltd| GB1279706A|1969-08-12|1972-06-28|Girling Ltd|Automatic adjuster for hydraulic actuators for disc brakes| US3662864A|1969-11-05|1972-05-16|Kelsey Hayes Co|Disk type brake with split primary shoe| US3885650A|1969-12-02|1975-05-27|Hermann Klaue|Spreading disc brake with removable shoes| US4024931A|1969-12-02|1977-05-24|Hermann Klaue|Disk brake assembly for vehicles| US3680666A|1970-01-08|1972-08-01|Sommer Co|Motor brake unit| DE2051863A1|1970-10-22|1972-04-27|Klaue H|Multi-disc full-lined disc brakes, in particular for motor vehicles| GB1368890A|1972-03-24|1974-10-02|Girling Ltd|Wheel brakes having lock actuators| CH573558A5|1974-01-25|1976-03-15|Klaue Hermann|Hydraulically actuated disc brake - has solid brake pads within rotating housing split circumferentially or diametrically| DE2415823A1|1974-04-01|1975-10-16|Klaue Hermann|Hydraulic or pneumatic brakes for lorry - with pneumatic and hydraulic servos in line with hold-off cylinder| DE2426007C2|1974-05-30|1984-03-22|Hermann Dr.-Ing. Montreux Klaue|A braking device formed from a full disc brake with a circumferential, outwardly open brake housing and a drum brake| JPS5629589B2|1974-06-26|1981-07-09| DE2441605C2|1974-08-30|1986-03-20|Hermann Dr.-Ing. 3302 Cremlingen Klaue|Hydraulically or pneumatically operated full-pad disc brakes, in particular for motor vehicles| DE2442971C2|1974-09-07|1985-08-01|Hermann Dr.-Ing. 3302 Cremlingen Klaue|Pressure medium-operated disc brakes, in particular for motor vehicles| DE2510193A1|1975-03-08|1976-09-16|Wabco Westinghouse Gmbh|PRESSURE-ACTUATED DISC BRAKE, IN PARTICULAR FOR VEHICLES| DE2514085A1|1975-03-29|1976-10-07|Klaue Hermann|Disc brakes with automatic adjustment - has inclined contact surface fitted between operating mechanism and brake disc|DE3032828A1|1980-08-30|1982-04-15|Wabco Fahrzeugbremsen Gmbh, 3000 Hannover|FULL-PAD DISC BRAKE| US4442930A|1981-06-15|1984-04-17|Montalvo Sr Edwin J|Air actuated force intensifying piston and cylinder assembly for brakes and clutches| DE3146819A1|1981-11-26|1983-06-01|Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover|Disc brake| DE3226983A1|1982-07-19|1984-01-26|Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover|Full-lining disc brake| JPH0668299B2|1986-08-13|1994-08-31|株式会社クボタ|Work vehicle disc brake structure| US5148894A|1990-10-11|1992-09-22|Allied-Signal Inc.|Disk brake/parking brake with threaded piston rod and motor| DE19502927A1|1995-01-31|1996-08-01|Teves Gmbh Alfred|Combined service and parking brake| DE19512354C1|1995-04-01|1996-11-14|Klaue Hermann|Road and parking brake for vehicle rear wheels| GB9711617D0|1997-06-06|1997-07-30|Lucas Ind Plc|Improvements relating to disc brake assemblies| US6089357A|1997-09-30|2000-07-18|Jackson; David C.|Dual piston swing brake system for cranes| ITBA20020047A1|2002-12-17|2004-06-18|Enertec Aktiegesellschaft Ag|METHOD OF REALIZATION OF A SUBMERSIBLE PUSH-PLATFORM LOCKED FOR THE PRODUCTION OF ELECTRICITY FROM THE WIND IN THE OPEN SEA AND OF MARICULTURE PRODUCTS| DE10320906B4|2003-05-09|2007-12-27|Lucas Automotive Gmbh|Hydraulically actuated vehicle brake| US6920964B1|2003-12-12|2005-07-26|Robert Bosch Corporation|Automated hydraulic brake| JP2005214286A|2004-01-29|2005-08-11|Hitachi Ltd|Disc brake| JP4084767B2|2004-03-26|2008-04-30|本田技研工業株式会社|Parking brake device| US7458445B2|2004-03-26|2008-12-02|Honda Motor Co., Ltd.|Parking brake system| JP2005282613A|2004-03-26|2005-10-13|Honda Motor Co Ltd|Parking brake unit| JP4011033B2|2004-03-26|2007-11-21|本田技研工業株式会社|Parking brake device| JP4084775B2|2004-03-31|2008-04-30|本田技研工業株式会社|Parking brake device| DE102004016367A1|2004-04-02|2005-10-20|Lucas Automotive Gmbh|Hydraulically actuated vehicle brake| JP4507866B2|2004-12-06|2010-07-21|株式会社アドヴィックス|Parking brake equipment| JP4595539B2|2004-12-28|2010-12-08|株式会社アドヴィックス|Common use parking brake device| JP5960290B2|2013-01-08|2016-08-02|ナブテスコ株式会社|Brake cylinder device and disc brake device| US9956971B2|2014-12-16|2018-05-01|Faiveley Transport Amiens|Rail vehicle braking system and braking method for a rail vehicle comprising such a system| AU2014277743B2|2014-12-17|2020-01-02|Faiveley Transport Amiens|Rail vehicle braking system and braking method for a rail vehicle comprising such a system| WO2020246823A1|2019-06-04|2020-12-10|한화테크윈 주식회사|Network surveillance camera system and method for operating same|
法律状态:
优先权:
[返回顶部]
申请号 | 申请日 | 专利标题 DE19762646870|DE2646870C2|1976-10-16|1976-10-16|Service and parking / auxiliary brake actuation device for fully lined disc brakes| 相关专利
Sulfonates, polymers, resist compositions and patterning process
Washing machine
Washing machine
Device for fixture finishing and tension adjusting of membrane
Structure for Equipping Band in a Plane Cathode Ray Tube
Process for preparation of 7 alpha-carboxyl 9, 11-epoxy steroids and intermediates useful therein an
国家/地区
|