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开采容易自燃和自然
高分求高手翻译,礼拜五之前,分数可追加,多谢
答:
A mineral well is well ventilated and safe Section 1 is all the condition 1, gas The provision of the basis coal mine safe rules distance Article 133s:" In a mineral well as long as have to discover a gas in a coal( rock) layer, the mineral's well is the gas mineral...
土地整理复垦的方法
答:
是整理还是复垦?复垦的话又分充填复垦和非充填复垦方法,充填的有煤矸石充填或者粉煤灰充填,非充填的有挖深垫浅法,疏排法等。。。
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