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- Sublevel caving technique has been utilized in Datong mining area under hard rock and hard coal, problems including low recovery ratio and spontaneous fire in gob have been overcome to achieve safe and high prodction. 大同煤矿集团“两硬”条件侏罗纪厚煤层下分层工作面应用低位放顶煤开采技术,解决了传统工艺所造成的煤炭资源回收率低、空区自然发火危险程度高等技术难题,实现了安全高效开采的目的。
- hard rock and hard coal 两硬
- In the 1970s, groups played hard rock and punk music, instead. 而到了70年代,乐队开始演奏重金属和朋克音乐。
- Mechanism of Rock Burst under the Combined Conditions of Hard Coal and Hard Rock 坚硬煤岩组合条件下冲击矿压发生机理
- Now the Hawks are between a rock and hard place with Josh Smith. 现在,老鹰和约什史密斯又处于了不尴不尬的境地。
- With teeny-bop, hard rock and classic rock, Maine's summer music menu is filling up. 有金属摇滚、重摇滚和轻摇滚,缅因的夏季音乐套餐的菜单正在被填满。
- Ben Affleck, the actor, recently lost about $800,000 at the Hard Rock and is known as a huge tipper over there. 还有演员班艾弗列客,进来就在硬石赌场输掉八十万元,而且据说他给小费非常大方。
- With teeny -bop, hard rock and classic rock, Maine's summer music menu is filling up. 有金属摇滚、重摇滚和轻摇滚,缅因的夏季音乐套餐的菜单正在被填满。
- In this paper, the basic physical and themical properties of the pulverized bituminous and hard coal used in XISCO (Xiangtan Iron and Steel Company)B. 作者测定了湘钢高炉喷吹用烟煤与无烟煤粉的基本物理化学性能,进行了烟煤与无烟煤混合喷吹的试验研究;
- The discussion was made on the technology used in gravel, boulder and hard rock formation. 探讨了在卵砾石、漂石等复杂地层以及坚硬基岩中进行旋挖钻进所用钻头的结构及其施工工艺。
- For solo, duo, group or collaborative performances, without vocals. Includes Rock, Hard Rock and Metal. Singles or Tracks only. 此奖适用于个人、人、体或者合作的艺术家们,不包含人声。风格包括摇滚,硬摇滚和金属音乐。限仅于单曲或一首歌曲。
- The experiment indicates that there exists difference between soft and hard rock during their concretion and settlement. 实验表明,软硬不同的岩体在固结沉陷过程中存在明显差异。
- She is crazy about rock and roll. 她喜欢摇滚乐。
- I'm going to a rock and roll concert tonight. 我今晚正要去参加摇滚音乐会。
- The ship struck on a rock and sank. 船触礁沉没。
- We sought long and hard but found no answer. 我们费力多时也未找到答案。
- Lately they have been getting into hard rock. 近来他们一直热衷于演奏硬派摇滚。
- The yacht hit a rock and damaged her bows. 游艇碰上了礁石,撞坏了船头。
- The ship struck upon a rock and soon went under. 这只船撞到一岩石而很快沉没了。
- Krapp L,HE Ying-chen.Testing method for determining the permeability of low permeable loose and hard rock[J].Journal of Hebei Institute of Architectural Science &Technology,1998,30 (2):27-30. [2]Krapp L;赫英臣.;弱渗透松散和坚硬岩石的渗透性测定方法[J]