pressure control stop valve
bellows-operated pilot valve
change-over pilot valve
Pilot Valve
引示阀
液控单向阀
导引阀
试验井
导向阀
先导阀
导阀
指挥器
挤压点
导瓣
导井
前向导阀
sequenced pilot valve system
angle stop valve
角止阀
折角截止阀角制动阀
角式截止阀
角制动阀
折角截止阀
reverse water stop valve
self-made simple stop valve
stop valve
采矿室
切断阀
止阀
截止阀
工作面
停止阀
阻塞阀
止水阀
气动胶管阀
节流阀