就水和空气不偶合装药爆破冲击波的产生，及在炮孔内介质中的传播、反射和透射以及对周围岩石的作用过程都进行了详细的介绍。
It also introduce the causing of shock wave in the water and the gas, and its spread in blasting hole, as well as its reflection and transmission and effects of rock.
造成这种煤的变质程度升高而夹矸成分转化的主要原因是区域变质作用及周围介质条件影响所致。
The main reason for the rise of the coal rank and its composition transformation is the process of regional metamorphism and the influence of medium conditions around it.
该产品是在橡胶海绵或橡胶泡沫的周围裹着一层高导电性和耐磨性的导电纤维布，以形成一种屏蔽作用的衬垫介质。
The product is in rubber sponge or rubber foam wrapped around the high conductivity and wear resistance of conductive fiber cloth, forming a shield effect of liner medium.
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