短語詞組短語Valve seat Valve clack 閥座Valve clack steel casting 閥瓣鑄鋼件nuclear valve clack 核閥閥瓣Valve clack membrane 閥瓣膜clack valve 止廻閥;[機]瓣閥;逆止閥;翼門閥pressure clack valve 壓放閥air inlet clack valve 進氣瓣閥;進氣活門ball clack valve 球瓣單曏閥clack k valve 瓣閥 返回 valve clack