您要查找的是不是：
- contiguous coal seam group 近距离煤层群
- contiguous coal seams group 近距离煤层群
- The example of the large dip angle and the coal seam group is the Yuexu area in Tangshan Mining Filiale. 大倾角、煤层群采煤设计以开滦唐山矿业分公司重点衔接区域岳胥区-680水平采区为设计对象。
- coal seam group with close quarters 近距离煤层群
- coal seam group with near interval 近距离煤层群
- mining of closed distance coal seam group 近距离煤层群开采
- Design on the caving of the large dip angle coal seam group 大倾角煤层群采煤设计初探
- Study of floor water hazard controlling for steep A coal seam group mining 急倾斜A组煤层开采底板岩溶水水害防治研究
- STUDY OF MINING OF GENTLY-INCLINED COAL SEAM GROUP IN ASCENDING ORDER 缓倾斜煤层群上行开采的研究
- coal seams group at close quarters 近距离煤层群
- Analogy Simulation Research on Mining of Closed Distance Coal Seam Group of Qianjiaying Coal Mine 钱家营近距离煤层群开采的相似模拟研究
- Bias W-type Ventilation in Short-interval Coal Seam Group Face and Its Application 近距离煤层群工作面的偏W型通风方式及其应用
- Analysis on existing problems in geological report of coal seam group of Haita'er Mining Area 海塔尔矿区一煤组地质报告存在的问题分析
- Reasonable Arrangement of Gas Drainage Roadways in Roof of Short-interval Coal Seam Group 近距离煤层群底板瓦斯抽放巷合理布置探讨
- Coal miners; coal seams; coal haulers. 煤矿工; 煤层; 运煤工
- Coal seams intermixed with iron ore. 煤层和铁矿混杂在一起。
- thin coal seam group 薄煤层群
- coal seam group (set) 煤层群（组）
- The Gaussian curvature of No.3 coal seam in Qinshui basin is calculated. 计算了沁水盆地3号煤层的高斯曲率。
- Factors affected coal seam permeability change and its law is analyzed. 分析了煤层透气性变化的影响因素及变化规律。
