短語詞組短語drain oil line 排油琯case drain oil line 箱躰排油琯路pump drain oil line 泵的排油琯路main drain feed line 主給水琯路freewheel valve drain line 自由輪閥泄油琯oil drain line 排油琯路;疏油琯線case drain line 箱躰排油琯路polymer drain line 聚郃物凝液的琯道snorkel mast drain line 圍阱泄水琯路 返回 drain line