短語詞組短語vacuum switch tube 真空開關(guān)管vacuum -tube ageing 真空管時效vacuum thermionic tube detector 真空熱離子管檢波器vacuum advance tube 真空提前管vacuum conveyer tube 真空輸送管;翻譯Vacuum furnace tube 真空爐管vacuum sampling tube 真空取樣器 返回 vacuum tube