protected coal seam的意思|示意
保护煤层
protected coal seam的网络常见释义
被保护煤层 ... 钡钙十字石 wellsite 被保护煤层 protected coal seam 焙 baking ...
protected coal seam相关例句
When the protective coal seam is mined, the gas management on the protected coal seam is a very important job.
保护层开采时，对被保护层的瓦斯治理是一项非常重要的工作。
The probability of the gushing in a large area can be avoided by mining protected coal seam and adjusting mining program.
从调整开采程序，利用开采保护层实现大面积消除突出危险性；