JasonZhou520
管头shoe, tubing head;提管,dog pipe;连接法兰coupling flange ;joint flange;取样管bleeder ;coupon ;probe tube ;sampling pipe ;sampling tube活塞piston,plunger,stopcock单向球阀ball non return valve ;ball nonreturn valve样管test cylinder连接器junctor ; connector刀口cutter point ;cutting point ;edge of tool ;knifeedge杠杆lever释放器releaser重锤weight dropper
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