1) roof and floor lithologic
顶底板岩性
1.
Researches on No.9 coal seam and its roof and floor lithologic in the eastern part of Jincheng coal mining area;
晋城矿区东部9号煤层及其顶底板岩性的研究
2) roof and floor rocks
顶底板岩体
3) roof and floor rock
顶、底板岩石
1.
Based on the mechanical properties of coal and its roof and floor rock from different area,the mechanics characteristics of main rock types were summarized,and the difference of rock mechanics properties among them was discussed.
基于不同地区煤岩及顶、底板岩石样品的力学性质数据,总结了主要岩石类型的力学性质特征,重点对两者力学性质的差异进行了对比研究,分析了决定岩石力学性质的主要控制因素,如岩性、孔隙特征和含水率。
4) roof lithology
顶板岩性
5) roof and floor stability
顶底板稳定性
6) slate roof
板岩顶板
补充资料：顶底复吹转炉的炉底(正在倾炉出钢)(宝钢)
顶底复吹转炉的炉底(正在倾炉出钢)(宝钢)
顶底复吹转炉的炉底(正在倾炉出钢)(宝钢)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条