在许多大型养殖场中，沙子都是从散栏畜舍中“循环利用”进入排水沟或巷道，跟污水一起被运送到回收系统，然后重新用到散栏畜舍。
In many large farms, the sand is "recycled" from the free stall, into the gutter or alley, carried by water to a recovery system, and then reapplied to the free stall.
用于工业与民用建筑的屋面、地下室、隧道、巷道、给排水池、水泵站等有防水抗渗要求的混凝土工程。
Used for industrial and civil architecture roofing, basement, tunnel, tunnels, water supply and drainage pool, water pumping station, etc have waterproof impermeable concrete engineering requirements.
当倾斜长壁开采的综放工作面初采范围处于向斜构造区，造成初采放水无法利用已有巷道形成自流放水，必须考虑动力排水或其他的放水方式。
When long wall mining to the dip in fully-mechanized coal winning working face is inclined area, we may can't use existing drift draw off water.
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