基本解釋[經(jīng)濟(jì)學(xué)]密封外殼詞組短語短語rubber band sealed outer housing 橡膠圈密封外殼;橡膠圈彌縫外殼sealed outer housing更多詞組專業(yè)釋義經(jīng)濟(jì)學(xué)密封外殼