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可用万用表的R×1k或R×100挡测量任意两极之问的正、反向电阻，如果找到一对极的电阻为低阻值(100Ω～lkΩ)，则此时黑表笔所接的为控制极，红表笔所接为阴极，另一个极为阳极。晶闸管共有3个PN结，我们可以通过测量PN结正、反向电阻的大小来判别它的好坏。测量控制极(G)与阴极【C)之间的电阻时，如果正、反向电阻均为零或无穷大，表明控制极短路或断路；测量控制极(G)与阳极(A)之间的电阻时，正、反向电阻读数均应很大；
测量阳极(A)与阴极(C)之间的电阻时，正、反向电阻都应很大。
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订单配送查询 ASCO 102-845 SPARE PARTS KIT D517494
PREMIER PARTS A1RUP/00 NI44060-L0700 PAIR BRAKE SHOE PADS D429322
BMG05-10 01855336 1IN ID PRESSURE PLATE D503751
HonEYWELL 75893-2 SLIDEWIRE ASSEMBLY ACTUATOR REPLACEMENT PART D340960
AMP-ROSE 42B567S33 CHANGE GEAR REPLACEMENT PART D338471
AMP ROSE 42B529S272 CHANGE GEAR REPLACEMENT PART D336951
VICKERS F3 CVCS 63 N S2 10 HYDRAULIC DIRECTIonAL VALVE COVER D513763
MPI MP-214-0211 BODY MOUNT 1/2 IN ID STAINLESS ACTUATOR D423587
C02048 F216164 STEEL 22-3/8X2IN SHAFT REPLACEMENT PART D252023
HISCO 29-7/8 IN LG X 1-3/8 IN OD 122F ASSEMBLY STEEL PUMP SHAFT D414301
ECOLAB 92520055 G-R BELLOWS KIT 1-1/2 IN REPLACEMENT PART D432848
HELWIG 10-101527-770-3-19 CARBON MOTOR BRUSH REPLACEMENT PART D354059
DOBOY 443158 3/4IN STAINLESS SHAFT REPLACEMENT PART D238982
PSC W-16629 1-1/2IN ID VALVE BODY MANIFOLD ALUMINUM REPLACEMENT PART D301438
14-5/8 IN ConVEYOR ROLLER D445714
TRI CLOVER 30S-43-316L STAINLESS RETAINER REPLACEMENT PART D443491
REEVES 41511265VC SIZE 100 DODGE SPRING CARTRIDGE ASSEMBLY D399127
LAWRENCE EQUIPMENT 301777 1/2IN STEEL GEAR REPLACEMENT PART D275933
42TOOTH 1-3/8IN BORE HELICAL GEAR LH D394121
ATRA-FLEX M4 MILLENNIUM STANDARD COUPLING RING D501018
BUHLER UUX46109-014 STAINLESS DRIVE SHAFT 14-3/8X2IN D419661
SOLBERN 44266 LOCKING HEAD 3/8 IN BORE PULLEYS REPLACEMENT PART D247814
FISHER R480x000012 TYPE 480/481 -13 -15 SIZE 30 ACTUATOR REPLACEMENT B495023
ROVEMA 01316007 STEEL 24IN LONG 1-3/16IN OD 3/4IN GUIDE SHAFT D271173
ALVEY 6540082 1-7/16IN SHAFT 15X6-3/4IN ROLLER ConVEYOR D403633
ATRA-FLEX M-5 YELLOW ELASTIC INSERT COUPLING D422286
PFERD KHT 200-3 8 X 1/8 X 5/8 DIAMOND BORE CUTTING WHEEL D471165
TRI CLOVER VALVE STEM 2-3/4 IN OD 3/4 IN SHAFT STAINLESS D395443
TRI CLOVER 1-1/2X3IN SANITARY PUMP CASING STAINLESS REPLACEMENT PART B315900
KLIKLOK-WOODMAN 0029-07B 29-1/4X3/4IN STAINLESS SHAFT D421963
AMP-ROSE 42B 3210S4 CHANGE GEAR SPUR REPLACEMENT PART D370577
GROVE 9049101903 CRANE PARK BRAKE DRUM D440272
BROWN MACHINE 316 STAINLESS THERMOWELL 6IN LONG 1/2IN NPT FEMALE D371365
BRAN & LUEBBE 250994 1-1/2IN BORE BRASS WORM GEAR D393511
ASCO 99-257-5D RED-HAT COIL 120V-AC SOLENOID VALVE D442185
JAMESBURY RKA 6 MT REPAIR KIT REPLACEMENT PART D338956
LUMA #3 12MM SHAFT HANDLE ASSEMBLY HYDRAULIC VALVE D382534
WARREN RUPP 12DMB 2-5/16IN BORE STEEL PUMP PACKING GLAND D400489
ASCO 064-982-4-D RED-HAT SOLENOID VALVE 120V-AC COIL D463054
VALVE STEM 10-1/4IN TOTAL LENGTH 3-1/4 IN OD REPLACEMENT PART D437140
HISPEED 2D-01H-0222-02 ConVEYOR TAIL BEARING 12-1/4X1-3/16IN SHAFT D246550
GOULDS 74768-1-1001 BUSHING 3415 S PUMP OIL RING SLEEVE REPLACEMENT PART B435893