文章摘要信息 关键词 : 上保护层;开采厚度;红菱煤矿;膨胀变形量;应力 [gap=1283]Keywords : upper protective layer;thickness of mining;Hongling Coal Mine;inflation deformation;stress ..
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Upper protective layer ming 上保护层开采
The key problem encountered in extracting protective layer is to determine the protected scope, especially in mining steeply inclined upper protective layer using pitching oblique methods.
保护层开采的关键是确定保护范围,尤其是针对急倾斜俯伪斜上保护层开采保护范围划定遇到的难题更大。
参考来源 - 俯伪斜上保护层开采的保护范围划定研究·2,447,543篇论文数据,部分数据来源于NoteExpress
Unlike the protective layer of ozone in the upper atmosphere, excessive ground-level ozone is tied directly to health.
与高空中具有保护能力的臭氧层不同,过量的近地面臭氧直接危害人体健康。
One of the most disturbing aspects of the changes in Earth is the rate at which chemical pollutants produced by human activity are destroying the protective layer of ozone in Earth's upper atmosphere.
地球上的变化最令人烦扰的方面之一,是人类活动所产生的化学污染正在迅速破坏地球上部大气圈臭氧保护层。
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