DSJ41H法兰式水封截止阀

J61Y-170V P540J61Y-170V P540高温高压焊接截止阀

J41JJ41J衬胶截止阀

J41F46J41F46衬氟直流式截止阀

J45JJ45J衬胶直流式截止阀

JY41W氧气截止阀

J41Y锻钢自密封截止阀

J11Y、J61Y丝口锻钢截止阀、焊接式锻钢截止阀

BJ41YBJ41Y锻钢保温截止阀

J41H、J41Y锻钢法兰端截止阀

J41N燃气截止阀

J41F46 衬氟截止阀