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Chapter 93 First Official Military Examination
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... Today was dedicated towards excavating the marked roads, digging up space for rainwater drainage, water supply, central heating, and sewage pipes.
If rainwater or melted snow wasn't drained, the roads and sidewalk pavements would become flooded.
When that happened, the pavement grade would definitely decrease. As well as the lifespan of the pavement.
The central heating pipeline on the other hand, ensured that all buildings and houses were properly heated duri ...
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