短語(yǔ)詞組短語(yǔ)on -off valve 開關(guān)閥;開閉閥;雙位閥Full ON Full OFF 全開全關(guān);也叫整張紙全關(guān)clutch on -off 離合器離合key on engine off 靜態(tài)測(cè)試模式;點(diǎn)火開關(guān)打開;但引擎不起動(dòng);點(diǎn)火打開引擎關(guān)閉 返回 on off