基本解釋[經濟學]活塞調節(jié)閥詞組短語短語piston governor valve strainer 活塞調節(jié)閥濾器piston governor valve cage 活塞調節(jié)閥座balanced -piston governor valve 平衡式活塞調節(jié)閥piston governor valve retaining spring 活塞調節(jié)閥釦緊簧piston governor valve更多詞組專業(yè)釋義經濟學活塞調節(jié)閥