单词	cuum valve
释义	cuum valve 真空管,负压活门,真空阀
随便看	electronic record electronic record center electronic recorder electronic recording electronic recording component electronic recording equipment electronic recording machine Electronic Recording Machine Accounting electronic recording memory electronic recording potentiometer electronic recording tube electronic recording unit Electronic Record Keeping electronic records electronic rectifier electronic redlining electronic reductor electronic referee light system Electronic reference books electronic references electronic reference service electronic reference serviees electronic refraction electronic refrigerator electronic refuse