automatic cylinder drain valve
automatic fuel drain valve
drain valve
排放阀
排气阀
排泄阀
排出阀
排液阀
排污阀
排水阀
排流阀
放泄阀
放水阀
疏水阀
疏水门
spiral case drain valve
coastal front coastal front trapped wave
sloping delta front and basin delta front
pressure reducing valve reducing valve
valve disc type breath valve
yi (一)in front of ge (个)