基本解釋[經(jīng)濟(jì)學(xué)]滾珠軸承螺母詞組短語短語ball -bearing nut 球軸承螺母ball bearing nut detail 滾珠軸承螺母ball bearing nut更多詞組專業(yè)釋義經(jīng)濟(jì)學(xué)滾珠軸承螺母