And it is a usual existing appearance that people throw the spoil, debris and earth to near river bed or in vally of gully.

 
  • 礦山開(kāi)發(fā)中形成的廢棄土方、巖屑、礦渣等,就近傾倒在附近溝谷中,是一種很常見(jiàn)的現象。
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