水从井中抽上来后就立即加以净化。
The water was purified as soon as it was pumped up from the well.
以一个全封闭恒温车间内热处理油烟的收集与净化为例，介绍了井式淬火油槽和井式回火炉中所产生油烟的收集与净化方法。
A method for gathering and purifying the oil smoke which was produced by oil quenching tanks and tempering in the whole-sealed and constant-temperature heat treatment plant was introduced.
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