基本解釋[經(jīng)濟(jì)學(xué)]瓷絕緣子線軸詞組短語(yǔ)短語(yǔ)spool type porcelain insulator 線軸式瓷絕緣器porcelain spool insulator更多詞組專(zhuān)業(yè)釋義經(jīng)濟(jì)學(xué)瓷絕緣子線軸