基本解釋[機(jī)械工程]往複式運(yùn)動(dòng)詞組短語短語westbank reciprocatory motion 往複式運(yùn)動(dòng)reciprocatory motion更多詞組專業(yè)釋義機(jī)械工程往複式運(yùn)動(dòng)