短語(yǔ)詞組短語(yǔ)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 止回閥;[機(jī)]瓣閥;逆止閥;翼門閥pressure clack valve 壓放閥air inlet clack valve 進(jìn)氣瓣閥;進(jìn)氣活門ball clack valve 球瓣單向閥clack k valve 瓣閥 返回 valve clack