1) thick and hard dunn bass
坚硬厚层夹石
2) hard thick coal seam
坚硬厚煤层
1.
Study on top coal blasting technique of full mechanized caving in the hard thick coal seam;
坚硬厚煤层综放开采爆破破碎顶煤技术研究
2.
During caving the hard thick coal seam,the weakening treatment of top coal is a key problem influencing the comprehensive benefits of coal mine.
坚硬厚煤层放顶煤开采过程中,顶煤的弱化处理一直是困绕煤矿综合效益的关键问题,本文讨论了顶煤弱化处理的方法及其相关的处理技术,特别对爆破弱化技术进行了较多的叙述。
3.
The paper describes selection of key equipment and relationship among them in fully-mechanized roof-caving face in hard thick coal seam.
阐述了坚硬厚煤层综放开采关键设备的选型、设备间的工作关系等。
3) Hard solid rock
厚坚硬岩层
4) hard and massive strata
厚层坚硬岩层
5) hard and thick stratum
坚硬厚层岩层
6) hard and massive overlying strata
大厚度坚硬岩层
补充资料：大理石石渣罩面水磨石,镶嵌大理石片的水磨石
CAS：68038-71-1
中文名称：苏云金芽孢杆菌制剂；苏云金杆菌；大理石石渣罩面水磨石,镶嵌大理石片的水磨石；7216杀虫菌；BT生物农药
英文名称：bacillus thuringiensis；agritol；bacillus thuringensis；bacillus thuringiensis berliner；bactospein；bactur；bakthane；berliner；biotrol；bitoksybacillin；btb 202；dipel
中文名称：苏云金芽孢杆菌制剂；苏云金杆菌；大理石石渣罩面水磨石,镶嵌大理石片的水磨石；7216杀虫菌；BT生物农药
英文名称：bacillus thuringiensis；agritol；bacillus thuringensis；bacillus thuringiensis berliner；bactospein；bactur；bakthane；berliner；biotrol；bitoksybacillin；btb 202；dipel
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