This text explains to Xutuan coalmine west breeze well and main well a method, error margin for ofrun-through measuring analysis with anticipate.
介绍了许疃煤矿西风井与主井之间的贯通测量的方法、误差分析和预计。
2
According to characteristics of the coalmine production, the article analyses the power supply system in coal mines and discusses the economic run mode of the transformers and the lines.
根据煤矿生产的特点，对煤矿供电系统进行了分析，对变压器、线路的经济运行方式进行了探讨。
3
The power run steadily, and its brake function was improved apparently, and satisfied with require of safety in production of coalmine.