culverts
with a diameter of about 1.5m, depending on the flow of water that drains diameters vary by design. During the construction process drains, manholes and pits dug in the soft soil, it should piling Melaleuca or iron poles, piles 1m2 25 Melaleuca trees, the aim is to fix the land, against subsidence, erosion control.
đang được dịch, vui lòng đợi..
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