round standing-valve  圆形固定阀

gas valve valve seat  气门-门座

valve-valve base  气门-气门座

Valve-valve seat  气门-气门座

go round and round  旋转

round and round  旋转不息地

round-oval-round  圆－椭圆－圆

round-oval-round pass  圆─椭圆─圆孔型

went round and round  旋转

auxiliary valve relief valve setting  辅助阀安全阀调定

bell- shaped valve cup valve  钟形阀; 杯形阀

blade control valve relief valve  铲刀控制阀安全阀

brake valve relief valve  制动阀安全阀

butterfly valve + non-return intake valve  蝶阀+止回阀式进气阀

clack valve clap valve  蝶形阀

cooling valve charge relief valve pressure test  冷却阀加注安全阀压力试验

cup valve bell shaped valve  杯形阀; 钟形阀

cup valve(bell-shaped valve)  钟形阀; 杯形阀

dead-weight safety valve (weighted valve)  重码安全阀