短语词组短語main jet spray hole 主量孔噴油孔idling jet spray hole 怠速量孔噴油孔bottom jet hole 底噴孔multi -jet hole 多流孔air jet hole 噴氣口hole jet 微孔射流hole jet flow 孔射流double -hole jet 雙孔噴嘴jet type down -hole supercharger 射流式井下增壓裝置 返回 jet hole