Some different viewpoints on the origins of the Qiaotou sandstone in the Baode city of Shanxi Province.
对于山西保德地区桥头砂岩的成因，一直存在不同认识。
The thesis which takes Baode Country for example tells us what is the history like and how the women spent the time.
文章选取晋西北保德县为个案，展示晋西北妇女是在什么样的社会历史背景下走过来的。
Based on the construction of first grade intrinsic safety mine in Baode coal mine, the paper discussed mine intrinsic safety management system.
以神华神东煤炭集团公司保德煤矿建设本质安全管理体系一级矿井的经验，探讨煤矿本质安全管理体系。
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