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Chapter 154 Time bomb
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... xample, sinking ponds are not made of concrete, but are in the form of deep pits. For example, the heating problem of the first biological sewage treatment tank used a solar heating board. In the future, it can be used to make a microbial accumulation pit and use the fermentation of waste organisms to heat up.
The local farmers are still relatively friendly, and they did not ask for compensation for Xiao Ming's workers digging a ditch beside the ditch. When everyone was working, they brou ...
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