The loss of water through the calculation to determine the elevation of the structures for mapping elevation layout maps and graphic layout plan provided basis.
通过对水利损失的计算，确定了各构筑物的高程，为绘制高程布置图和平面布置图提供了依据。
The loss of water through the calculation to determine the elevation of the structures for mapping elevation layout maps and graphic layout plan provided basis.
通过对水利损失的计算，确定了各构筑物的高程，为绘制高程布置图和平面布置图提供了依据。
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