mine lighting

Based upon analysis of the importance of illumination in coalmine tunnel for the improvement of labor productivity, ensuring coal quality and accidents elimination the lightness scales, calculation method and cable laying are elaborated for coalmine illumination.

介绍了矿井照明对于提高煤矿劳动生产率,保证煤炭质量和减少人身事故的重要作用,详细阐述了照度标准、计算方法及电缆敷设的具体内容,提出了改善照明水平的三个有效措施。

Main microbe group in the supergene zones of Mingshan gold deposit in northwestern Guangxi and their metallogenic significance;

桂西北明山金矿床表生带微生物类群特征及其成矿作用探讨