The first step, because the river entities seeper, milling equipments must float on water work, need USES the steel plate made floating bodies, plate thickness of 3.5-4 mm.
第一步，因为河道里存有积水，选矿设备必须要浮在水面上工作，需要用钢板做成浮体，钢板厚度为3.5 - 4毫米。
Pervious cement pavement concrete is of good perviousness, it can release the problems of highway seeper and urban environment, so it is a sort of environmental protection concrete.
透水水泥路面混凝土具有良好的透水性，能够缓解公路积水和城市环境问题，是一种环保型的混凝土。
Aiming at complex circumstance of waste rock hill, such as forming gully, seeper pool and so on, multifractal offers a new method to settling the problem of groundwater contamination.
针对矸石山附近存在冲沟、积水池等复杂条件下的地下水污染问题，多维分形提供了一种新的研究方法。
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