Then, by studying the control management of coal mine accident in China, accident rate is chosen as the reference standard to judge the level of intrinsic safety in coal mine.

分析我国煤矿生产的现状与差异，提出了对我国煤矿的本质安全性进行分类判别的思想；

youdao

Then, by studying the control management of coal mine accident in China, accident rate is chosen as the reference standard to judge the level of intrinsic safety in coal mine.

分析我国煤矿生产的现状与差异，提出了对我国煤矿的本质安全性进行分类判别的思想；

youdao