variable orifice可变: variable; changeable节流: reduce expenditure孔: hole; opening; aperture可变节流口: settable orifice节流孔: restriction; throttling orifice下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:可变节流孔,即可在微信中查询翻译