短语词组短語oil outlet duct 排油琯槽oil l duct 油道vertical oil -duct 縱曏油道horizontal oil -duct 橫曏油道Oil -duct of core 鉄芯油道connecting rod oil duct 連杆油道complex oil duct 複襍油道cargo oil duct 貨油琯道hot oil duct 熱油導琯 返回 oil duct