VARIAN TV801/TV902 分子泵Max operating ?power: ?- 450 W with forced air? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ??-300 W with airMax operating ?power: ? ?- 320 W with forced air （902）分子泵常见故障（四）转动时震动和噪声大1.转子动平衡不好2
