According to the number of practical data coming from drills and mines, the author puts forward classification of broken coal.
本文以陕西韩城矿区北区钻孔和井下大量的实际观测资料为依据，提出了破坏煤分类的方案。
This article introduces the characteristics, classification, structure and sealing method of Lithium battery as well as a design method of primary Lithium battery pack applying on sea mines.
介绍了锂电池的特点、分类、结构及密封方式，给出了水雷用一次锂电池组在水雷中应用的设计方法。
This paper discusses the classification of the stages of engineering geological works at coal mines and the assignments of the works in these stages.
本文论述了煤炭矿山工程地质工作的阶段划分及各阶段工程地质工作的任务。
Also this paper discusses the classification of the designed structure model of underground mines.
论文对地下矿山构建筑物模型进行分类研究。
Also this paper discusses the classification of the designed structure model of underground mines.
论文对地下矿山构建筑物模型进行分类研究。
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