基本解釋[經(jīng)濟學]殼體泄油管詞組短語短語case drain oil line 箱體排油管路motor case drain line 馬達殼體排放管路pump case drain line 泵體排油管路case drain line更多詞組專業(yè)釋義經(jīng)濟學殼體泄油管