Loose covering layer that consisted of water containing fine powder sand layer was encountered in the overcasting at Zhaodianzi Iron Mine.
赵店子铁矿在露天开采中遇到了含有含水粉细沙层的松散覆盖层。
Loose covering layer that consisted of water containing fine powder sand layer was encountered in the overcasting at Zhaodianzi Iron Mine.
赵店子铁矿在露天开采中遇到了含有含水粉细沙层的松散覆盖层。
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