您要查找的是不是：
- The Cause Analyses on Heavy Roof Fall Accident and its Preventive Measures 单体液压支柱工作面顶板事故的原因与防治
- Research on Comprehensive Control Technique for Heavy Roof Fall in Weak Mudstone Drift 松软泥岩巷道大冒顶综合治理技术的研究
- Four large columns upheld the building's heavy roof. 四根大柱子支撑着这座建筑物的沉重屋顶。
- The roof fell before he had time to rush out. 他还没有来得及跑出来,房顶就塌了。
- The miners were entombed in the cave when the roof fell in. 塌顶时矿工们被埋在坑内。
- Part roof fall accident cause is analyzed in flase top mining in No.5 Coal Seam of Pinggang Coal Mine.The prevention and cure measures are pointed out. 通过对平岗煤矿5%23煤在托伪顶回采时发生的局部冒顶事故原因的分析,提出了解决该问题的防治措施。
- On the basis of spot investigation,the reason of sloughing and roof fall is analyzed,the technology measure is pointed out. 根据对工作面地质条件和现场的实际观察研究,对工作面片帮、冒顶现象的发生原因进行了分析,提出了预防片帮、冒顶的技术措施。
- The II3123 face is a light type caving face of three-soft coal seam.the roof is cracked,sloughing and roof fall often occur. 石台煤矿II3123工作面为"三软"煤层轻放工作面,顶板破碎易掉,片帮、冒顶时常发生。
- The roof fell about my ears. 层顶就在我的身旁坍下来。
- The roof fell beforehe had time to dash into the room to save his baby. 他还没来得及冲进房间把孩子救出来,房顶就塌了。
- The roof fell in. 屋顶塌陷了。
- During mining, the stress behaviors of workface are very obvious.Thin rock strata of roof fall by full thick, procreant cranny reach the earth's surface and have clearly sidesteppedsubsidence. 在回采过程中，工作面矿压显现比较明显，顶板基岩沿全厚切落，产生的裂隙通达地表并有明显的台阶下沉。
- During mining, the stress behaviors of workface are very obvious.Thin rock strata of roof fall by full thick, procreant cranny reach the earth's surface and have clearly sidestepped subsidence. 在回采过程中，工作面矿压显现比较明显，顶板基岩沿全厚切落， 产生的裂隙通达地表并有明显的台阶下沉。
- After a heavy fall, snow heaped up every-where. 大雪后，到处都堆起了雪堆。
- She and I can't live under the same roof. 她和我不能住在一起。
- The heavy rain shattered on the roof. 大雨哗啦啦打在屋顶上。
- The storm caused the roof to fall in. 暴风雨把屋顶搞塌了。
- A heavy or abrupt fall or collision. 坠落、碰撞重重的或突然的下落或碰撞
- Roof falling of rock bolting supported tunnel is usually paroxysmal in a big area, so safety monitoring is of great importance. 锚杆支护巷道顶板冒落具有突发性和冒落面积大的特点,安全监测非常必要。
- He lugged a heavy handcart along. 他使劲拉走那笨重的手推车。
