By the end of the nineteenth century not only were mechanical, civil, and mining and metallurgical engineering established but the newer specialties of chemical and electrical engineering emerged.

到19世纪末，不仅机械，土建，采矿和冶金工程得到了提高，还出现了较新的如化学和电气工程这样的专业。

youdao

Study on rock features is premise and basis for mining project design and research. Selection of rational mechanical parameters of rock is very important for safety and economy of engineering.

岩体特性研究是工程设计和研究的前提和基础，岩体力学参数取值合理与否，直接关系到工程的安全性和经济性。

youdao

It is certainly a new and valuable modeling and testing research platform for studies of both water inrush in coal mines and related mechanical problems in deep mining engineering.

显然，该装置为深部开采中的岩石力学问题以及矿山突水机制与防治的试验研究与测试工作提供了新的、具有重要作用的平台。

youdao