短語(yǔ)詞組短語(yǔ)vacuum tube converter 電子琯變頻器vacuum tube frequency converter 電子琯變頻器vacuum m tube converter 電子琯變頻器vacuum -tube converter [電子]電子琯變頻器vacuum thermo -electric converter 真空熱電變換器vacuum m thermo -electric converter 真空熱電變換器 返回 vacuum converter