抽气泵的排气管应该导向室外空旷处或导向一座通风橱。
The pump exhaust should lead to the open air or a fume hood.
VD精炼炉的真空抽气泵工作时蒸汽压力稳定而流量具有周期性，间断使用。
The pressure of the steam used in the vacuum pump of VD refining furnace is stable, but its flow is periodic.
连接露点检测机吸管与氧气传感器出气口后，打开相关旋钮，打开露点检测器的抽气泵，抽气5分钟。
Connect the Dewchecker suction tubing to the gas outlet point of the Lambda probe and open the relative cock, switch on the Dewchecker suction pump and draw off the gas for 5 minutes.
连接露点检测机吸管与氧气传感器出气口后，打开相关旋钮，打开露点检测器的抽气泵，抽气5分钟。
Connect the Dewchecker suction tubing to the gas outlet point of the Lambda probe and open the relative cock, switch on the Dewchecker suction pump and draw off the gas for 5 minutes.
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