您要查找的是不是：
- In mining, if the hard roof is submitted to shear failure, the sidesteps might sink or even collapse. 摘要综放面开采过程中，坚硬顶板超前剪切破坏，会造成工作面台阶下沉，甚至工作面整体垮落。
- The movement of hard roof in manless working face extraction has been simulated with three dimensional distinct element code for dividing into four stages. 分4个阶段模拟了无人工作面开采坚硬顶板采场顶板的运动规律。
- Through changing the face support fashion,the hard roof is managed by cutter top supports to increased cutter top resistance in Qitaihe Tiexi Coal Mine. 七台河铁西煤矿通过改变工作面支护方式,使用切顶支架增大切顶阻力来管理坚硬顶板,使坚硬顶板得到了较好的控制,杜绝了顶板事故的发生。
- Hard-top convertibles have become increasingly popular because they offer the top-down fun of a convertible with the quietness and security of a hard roof when the top is up. 硬顶敞篷车开始越来越流行，因为他具备了敞篷车的乐趣和全顶车的安全。
- In view of the compound hard roof of Six picks the area,through carrying on the comprehensive servation and the mechanics analysis appeared to pressure appears of the working face production process. 针对复合型坚硬顶板的六采区,通过对工作面生产过程的矿压显现进行了全面观测和力学分析。
- The longwall may relax some safety problems, but the other safety problems such as hard roof rock, the colliding and friction of the caved rock each other may be induced or intensified . 但是也可能诱发一些安全问题,如坚硬顶板对支架的冲击、采空区垮落岩石的撞击与摩擦诱发瓦斯事故等。
- The hardness and thickness of coal seam play a great role in the vertical distribution of stress in coal and the occurrence of rock bunt under the condition of hard roof and hard floor. 在“两硬”条件下，煤层厚度与硬度的变化对煤体中的应力分布有着很大的影响，从而对煤岩体系统中冲击矿压的发生有着很大的影响。
- The false alibi threw the police off the scent. 那个不在犯罪现场的伪证使警方失去了线索。
- An unwanted false electronic pulse. 一种不希望有的假电子脉冲。
- It is hard to sleep without a cooler in this room. 没有空气调节器，在这间屋里很难入睡。
- She deluded herself with false hopes. 她以虚幻的希望欺骗自己。
- The article has too many false presumptions. 这篇文章中凭空臆测的东西太多。
- The impostor traveled on a false passport. 那个伪装者用一本假护照旅行。
- The doctor scotched her false story. 医生戳穿了她的骗局。
- Central caving method in full-mechanized face under hard roof 坚硬顶板条件下综采工作面中部放顶的方法
- He made a false accusation against his neighbor. 他诬告他的邻居。
- The witness is giving false testimony. 那个证人在作伪证。
- Don't be led astray by false theories. 不要被错误的理论引入歧途。
- John felt it hard to rig out his family. 约翰感到难以为一家大小置备衣着。
- He is indignant at the false accusation. 他对被诬告愤愤不平。
