Turn the three-way valve towards the monoblock pump to vacuumize the specimen storehouse.
将三通阀打向直联泵，对样品仓抽真空。
Close the reducing valve of helium steel cylinder and the monoblock pump of the molecular pump group.
关闭氦气钢瓶的减压阀和分子泵组的直联泵。
Close the reducing valve of helium steel cylinder and the monoblock pump of the molecular pump group.
关闭氦气钢瓶的减压阀和分子泵组的直联泵。
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