逆止阀 [机] check valve ; [机] non-return valve ; backflow barrier

逆止球 check ball

抽汽逆止阀 extraction check valve ; extraction non-return valve

黄铜横式逆止阀 brass swing check valve

滚柱逆止器 roller brake

逆止器 Back stop

带式逆止器 belt brake

双逆止阀装置 double check-valve assembly

油动逆止阀 oil-actuated check valve

逆止风门 Back Draft Damper