短語詞組短語Valve seat disc 雙座閥碟valve e disc 閥盤Valve guide disc guide 導(dǎo)向套main starting valve valve disc 主閥盤Snapon Flush Valve Seat Disc 沖洗閥座位光盤suction valve disc 吸入閥片Cracked valve disc 破裂閥閥板valve disc dia 加工氣門盤部直徑throttling valve disc detail 節(jié)流閥片 返回 valve disc