Ductile Gate Valve BS 5163

Ductile Gate Valve BS 5163 BS 5163 Gate Valve and BS 5153 Swing Check Valve Gate Valve Refractory Lined Gate Valve 是什么 GATE VALVE WITH BODY BLEED 中文是什么? Parallel expending gate valve 以及 expending gate&segment GATE VALVE EURO反译成中文是什么意思啊~ Gate Valve,Bolted Bonnet- Bolted Gland,OS & Y,Carbon Steel,. FC API 6A gate valve Body,中文是什么? non-rising spindle gate valve是什么阀门啊! full bore gate valve 是个什么阀门?full bore valve VALVE BALL FB,WRENCH OP,BS-EN-17292,SW,SS,FORGED,ASTM A182 G