生物注气法，即将氧气泵入地下。
The biosparging relies on pumping additional oxygen underground.
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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