new concrete slabs the construction site concept urban sewerage infrastructure modernization and reconstruction |
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| navigate by keyword : age background cement circle concrete construction development drainage engineering equipment excavation gray green ground hole horizontal industrial industry infrastructure installation landscape laying material municipal new outdoor people pipe pipeline pipes plumbing product reconstruction repair replacement ring sewage sewer sewerage site slabs supply system technology trees trench urban water work |
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| New concrete slabs at the construction site. The concept of urban sewerage infrastructure, modernization and reconstruction of the underground system. |
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