电真空器件
Vacuum electronics tube
vacuum tube
Vacuum electronic devices
Vacuum electronics components
Electronic vacuum device
vacuum electron tubes
Vacuum electronic device
KeywordElectronic vacuum device
真空循环蒸馏器
vacuum circulation distilling apparatus
真空雪崩光电二极管(VAPD)
vacuum avalanche photon diode
真空悬浮式动力制动器
vacuum-suspended power brake
真空悬浮熔炼
vacuum suspension smelting
真空悬浮区熔晶体
vacuum float zone crystal