1.
Technique of Bottom Grouting Transformation at Second-1 Coal Seam,21041 Face of Gaocheng Coal Mine
告成煤矿21041工作面二1煤层底板注浆改造施工工艺
2.
QUANTITATIVE ANALYSIS ON THE THICKNESS VARIATION OF NO 2 1 COAL SEAM IN CHAOHUA MINE FIELD
超化井田二1煤层厚度变化规律定量研究
3.
The main minable seamⅡ_1 belenged marshy sediment in delta plain.
认为山西组是在三角洲环境下形成的，主要可采煤层二1煤是三角洲平原上的沼泽沉积。
4.
No.171 Coal Seam Coal Quality Characteristic Analysis and Assessment in Mayixi Second Minefield, Panxian
盘县马依西二井田17~(-1)号煤层煤质特征分析与评价
5.
Application of "1+1" model in Shuanghe Coal Preparation Plant
双河煤矿选煤厂“1+1”模式的实践应用
6.
Lectotype of Powered Support for 1~(-2) Coal Seam in Hanjiawan Colliery
韩家湾煤矿1~(-2)煤层液压支架选型
7.
Research on Top-coal Caving Difficult Degree of 8-1 Coal Seam of Baode Colliery in Shendong Mining Area
神东矿区保德煤矿8-1煤顶煤可放性研究
8.
sodium dinitro-1-naphtho
二硝基-1-萘酚钠
9.
double whole note
ph.1. 【音】二全音符
10.
Operation Practice of Coal Slurry System at Jining No.2 Coal Preparation Plant
济宁二号煤矿选煤厂煤泥水系统运行实践
11.
The application of coal volatile matter in determination of coal class for Pingdingshan No.12 Mine
用原煤样挥发分核定平煤十二矿煤的类别
12.
A TEST AND RESEARCH ON UNLOADING BY BLASTING IN COAL SEAM 2 IN MEN TOU GOU COLLIERY
门头沟煤矿二槽煤爆破卸截试验研究
13.
CHAPTER II PLANS FOR COAL PRODUCTION AND DEVELOPMENT AND CONSTRUCTION OF COAL MINES
第二章 煤炭生产开发规划与煤矿建设
14.
Permo-Carboniferous Coalfield Coal-Control Structure Features in Hebei Province
河北省石炭—二叠纪煤田控煤构造特征
15.
Research on Outburst Danger of Ⅱ_2 Coal Seam in Mengjin Coal Mine
孟津煤矿二_2煤层突出危险性研究
16.
Application of Seam Infusion on 2326 Working Surface of Qiao'er Colliery
煤层注水在桥二煤矿2326面的应用
17.
4.2 Measures of rational use of coal
（二）合理利用煤炭措施
18.
Evaluation of Reserves of Coal Bed Methane in Lower Permian Coaliferous Formation in Luoyang Region;
洛阳地区下二叠统二_1煤煤层甲烷资源评价