Нүүрс олборлогч компаниудын засвар үйлчилгээний …
coal mine is a cost-effective method of estimating the cost of maintenance as a research object. The survey results show that up to 17-23 percent of total operating costs for coal mining companies in the central region is the repairing costs. The cost of managing the mine maintenance unit and cost estimates combined with the value flow mapping and