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- Research on Fatalness Evaluation about Bolt Supporting of the Roof of Coal Drift 煤巷顶板锚杆支护危险性评价研究
- roof of coal drift 煤巷顶板
- On the roof of coal bed are consists of the mudstones in dark-gray or grizzle which will expand met water and wet air, with higher expansion stress and coefficient. 煤层顶板为深灰色和灰色泥岩，该岩石遇水和潮湿空气产生膨胀，膨胀应力和膨胀率大。
- The stone made a dent in the roof of my car. 我的汽车顶让石头砸了个坑。
- The roof of our house is covered by shingles. 我家的屋顶是用木瓦铺的。
- The roof of the house pitched at a 45°angle. 屋顶倾斜四十五度。
- Method of Coal Drift Heading through Fault 煤巷掘进过断层方法
- The roof of the old house caved in. 那栋旧房子的屋顶塌下了。
- The roof of the schoolhouse is covered with snow. 校舍的屋顶上覆盖着积雪。
- We need to replenish our stocks of coal. 我们需要再次补充煤的储备。
- We heard the rain spattering down on the roof of the hut. 我们听到雨滴滴答答打在小屋的顶上。
- Prohibition was laid on the export of coal. 禁止煤炭输出。
- The roof of that house caved in during the severe storm. 狂风暴雨中那房子的屋顶倒塌了下来。
- He put a shovel of coal on to the fire. 他往火炉里加了一铲煤。
- The roof of the mine caved in as a result of the explosion. 由于发生爆炸，矿井顶部坍塌了。
- Optimize the Construction Technique of Coal Drift Bolt Support 煤巷炮掘锚杆支护施工技术优化
- The roof of the tunnel caved in (on the workmen). 隧道顶坍塌(压住工人).
- We had a big delivery of coal today. 今天我们收到大批订购的煤。
- A shower of rocks and stones rattled on the roof of the dug-out. 一阵岩块和石子噼噼啪啪地打在掩蔽部的顶上。
- The country is short of known deposits of coal. 这个国家缺少已知的煤矿矿床。
