字典網>> 英漢字典>> D開頭詞條>>direct-current vacum-tube voltmeter的意思 漢英字典direct-current vacum-tube voltmeter中文翻譯：【電】 直流真空管伏特計相關詞條：director-general of fair trading directional graph directorate direct ophthalmoscopy direct material cost method direct ballottement directing direct object directory entry directing effect of group