基本解釋[經(jīng)濟(jì)學(xué)]砂紙加工機(jī)詞組短語短語band type sand papering machine 帶式砂紙打磨機(jī)sand papering machine更多詞組專業(yè)釋義經(jīng)濟(jì)學(xué)砂紙加工機(jī)