基本解釋[經(jīng)濟(jì)學(xué)]牙輪取心鑽頭詞組短語短語roller -cone core bit 牙輪巖心鑽頭core cone bit更多詞組專業(yè)釋義經(jīng)濟(jì)學(xué)牙輪取心鑽頭