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
The power run steadily, and its brake function was improved apparently, and satisfied with require of safety in production of coalmine.
改进后的制动电源制动性能有了明显提高，运行稳定，能满足煤矿安全生产的要求。
3
Vibration classification screen is the key to ensure the quality of washing raw coal and product raw coal in the process of changing from run-of-minecoal to washing raw coal.