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subsoil drainage
agric.	底土排水
bridg.constr.	下层土排水
tech.	基土排水; 亚土层排水; 亚层土排水; 底层土壤排水
water.res.	地下排水; 暗沟排水
subsoil drainage The removal of surplus water from within the soil by natural or artificial means, such as by drains placed below the surface to lower the water table below the root zone
environ.	地下排水 (自然或人工的手段，如通过放置在地表以下的水渠，以降低根区以下的水位，从土壤内去除多余的水。)
subsoil water drainage
tech.	地下水排除

subsoil drainage: 2 phrases in 1 subject

Technology

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