基本解釋[經(jīng)濟(jì)學(xué)]圓形密封連接器詞組短語(yǔ)短語(yǔ)circular r sealing connector 圓形密封連接器miniature circular sealing connector 小圓形密封連接器circular sealing connector更多詞組專業(yè)釋義經(jīng)濟(jì)學(xué)圓形密封連接器