短语词组短语exhaust valve push rod 排气门推杆valve push rod guide 推杆套管slide valve tail rod 滑阀尾杆brake valve push rod 制动阀推杆valve push rod tube 气门推杆管valve lift rod 阀升杆valve -rod nut 阀杆螺母valve push rod 推阀杆valve operating rod 阀操纵杆;阀把持杆 返回 valve rod