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- This paper introduces the cleat identification creterion, strict definitions of face cleat and butt cleat and their differences, cleat rank, formation and its control on coalbed permeability. 介绍了割理识别准则、面割理和端割理的区分及严格定义、割理级别、割理的研究内容、割理的形成以及割理对煤层渗透性的控制作用。
- This experiment bases on different permeability in different directions of coal seam cleats.To arrange methane drainage direction the directions vertical and parallel to face cleat are adopted. 根据煤层割理渗透率的各向异性,采用垂直面割理和平行面割理两个方向布置钻孔抽放煤层气。
- It is confirmed that the initial methane drainage of 100 metre well in direction vertical to face cleat is 1.2 times than parallel direction,and the exhausting coefficient is reduced by 0.537. 测定研究表明:垂直面割理方向钻孔初始瓦斯抽放百米流量是平行面割理方向钻孔的12倍,衰减系数比平行面割理方向钻孔减少了537%25。
- It is a fact of life and you must face it. 这是严酷的现实，你必须面对它。
- He tried to put a bold face on his failure. 他对自己的失败装出一副满不在乎的样子。
- I dry my hands and face with the towel. 我用毛巾擦干了双手和面部。
- The sea have erode the cliff face over the years. 海水经年累月冲刷著峭壁的表面。
- He stumbled over a stump and fell flat on his face. 他给树桩一绊，摔了个嘴啃泥。
- Get the stardust out of your eyes and face reality. 抛弃天真的想法而面对现实。
- A dash of water in his face will revive him. 向他脸上泼水能使他苏醒。
- I felt a certain indisposition to face reality. 我多少有些不愿意面对现实。
- Her face was overclouded with grief. 她的脸色因悲伤而变阴沉。
- His ashen face showed how shocked he was. 他面如土色，说明他多么惊骇。
- The shadow of death is on his face. 死亡的阴影笼罩在他的脸上。
- Her face is sprinkled with tiny freckles. 她的脸上有点点的雀斑。
- The climber had to negotiate a steep rock face. 那攀登者得攀越一陡峭岩石。
- The old lady has a haggard face. 老太太的脸很枯槁。
- An expression of pain flitted across her face. 她脸上闪过一种痛苦的表情。
- She covered her face with her hands. 她双手掩面。
- He lay face downwards on his bed. 他俯卧在床上。
