采煤
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excavate coal diggings 采煤矿区
excavate coal subsidence pool 采煤塌陷塘
excavate coal subside seeper area 采煤塌陷积水区
excavate of thin coal seam 薄煤层开采
Excavate coal subsided water area is the special component of the surface water in Huainan.
采煤塌陷水域已成为淮南市矿区一种特殊的地表水体。
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