The specific calculated data of mining technology in the steeply pitching medium thick coal seam and it's application effect in real construction are introduced.

介绍了急倾斜中厚煤层回采工艺的具体计算数据，以及在实际施工中的应用效果；同时介绍了采后沿空留巷的施工方法。

youdao

Chinese oil and coal companies have been looking overseas in their quest to secure energy supplies, pitching the Chinese flag in places like Sudan, which Western companies had largely abandoned under international pressure.

WSJ: China Becomes World's Biggest Energy Consumer

Chinese oil and coal companies were among the first to look overseas in their quest for energy supplies, pitching the Chinese flag in places like Sudan, which Western companies had largely abandoned under international pressure.

FORBES: China Passes U.S. As Top Energy User