acoal in bulk 煤炭散装[translate] aAngel heart 天使心脏[translate] a庆杰 Celebrates outstanding[translate] amy brother is a worker.he is two years than i 我的兄弟比我是worker.he是二年[translate] aA runaway horse 逃亡马[translate]
She took a picture and ___8___ it online. Quickly it was shared about 5,000 times. By the time this ___9___ went viral, Michael was already back at work in the mine. He had no idea what was happening until he ___10___ that night.“When I went out and got ___11___,...
Therefore, the grouting material must reduce the maximum reaction temperature of the coal mine reinforcement material grouting process. Based on the characteristics of the above grouting materials, the new polyurethane composite material developed in this paper represents a new, low-temperature and safe...
Its COP is close to but less than 1, but the device has the advantages of simple structure, good durability, and can work well in a wide range of wind speeds; it is also more versatile than the other two ways. Different from the general agitator in pursuit of high uniformity and ...
Therefore, it is important to explore a new functional design approach that could offer a good supplement to the existing functional design approach. 3. Working Principle and Property In affordance design theory [28], design represents the specification of a system struc- ture that possesses ...
Among these, the Datong coal mine area is the most typical hard roof area in China. No.2, 3, 11 and 12 coal seams in this area are all covered with hard roof [12–15]. In the THC, the roof is prone to hang over large areas before it caves and there is a gap between the ...