基本解釋[經(jīng)濟(jì)學(xué)]帶齒鉆頭詞組短語(yǔ)短語(yǔ)toothed d bit 帶齒鉆頭flat toothed bit 平底牙輪鉆頭toothed bit更多詞組專(zhuān)業(yè)釋義經(jīng)濟(jì)學(xué)帶齒鉆頭