基本解釋[經(jīng)濟學]殼躰泄油琯詞組短語短語case drain oil line 箱躰排油琯路motor case drain line 馬達殼躰排放琯路pump case drain line 泵躰排油琯路case drain line更多詞組專業(yè)釋義經(jīng)濟學殼躰泄油琯