coal seam

例句与用法

Study and practice on supporting technique in coal seam roof
煤层顶板支护技术的研究与实践
Variation law of b4 coal seam in tiehuashan coalfield
4煤层的变化规律
Structural analysis for roof movement for steep coal seams
大倾角煤层采场顶板运动结构分析
On developing coal seam gas resource in shanxi
论山西煤层气资源开发
Method of seeking for brocken wing coal seam
寻找断失翼煤层的方法
Discussion on evaluation methods for the denger of coal seam burst
煤层冲击危险评价方法的探讨
Cause analysis on thickness variation of coal seams in tucheng mine
土城矿煤层厚度变化成因分析
Microscopic characteristics of burst coal seams
突出煤的微观特征
Winning technology in unstable occurrence region of coal seams
煤层赋存不稳定区域采煤的回采工艺
Mining technology in 6 coal seam
综放开放采空区煤炭自燃防治技术