automatic stop and check valve

同义词释义

1)automatic stop and check valve,自动截止和逆止阀，主汽门2)main stop valve,主截止阀;主汽门，主汽阀3)extraction stop and nonreturn valve,抽汽截止-逆止阀4)extraction stop and non-return valve,抽汽截止逆止阀5)automatic stop valve,自动截止阀6)automatic check valve,自动逆止阀