dropping valve
英
美
- dropping n.点滴;滴下;落下物(复)droppings:动物的粪.动词drop的现在分词形式.
- valve n.瓣膜;真空管;阀门;电子管
- Look for any signs of leaking between the gun and the unloader valve.
检查一下水枪和减压阀是否有泄漏的迹象。
- No relief valve is required where two pressure reducing valves are installed.
如果装上两个减压阀,就不需要安全阀。