短语词组短语ejector kickout valve 推卸器反冲阀air ejector suction valve 空气射出器气阀ejector r valve 顶出阀ejector control valve 推卸器控制阀ejector valve spool 推卸器阀芯dust ejector valve 吹尘器阀ejector valve stem 推卸器阀柄 返回 ejector valve