介绍了这种装置在煤矿井下转弯巷道中的使用情况。
Describes the use of the device in coal mine roadway turning.
同时，对其在煤矿井下的安全应用提供了有力的保证。
Thus, it is significant to improve the flameproof feature on this type enclosure used in coal mine.
以柱靴为研究对象，探讨了工程塑料在煤矿井下应用的问题。
Application of the engineering plastics under the well of coal mine was explored with column base as the study object.
应用推荐