短語(yǔ)詞組短語(yǔ)mechanical back -to-back test [機(jī)]機(jī)械聯(lián)接式效率試驗(yàn)electric back -to-back test 背對(duì)背電測(cè)試back -to- test of inverter units 機(jī)組對(duì)拖 返回 back-to-back test