What are the working hours of miners in Sujiatun Coal Mine in Shenyang?

Coal mine is a regular operation cycle, so is time, especially for workers who work underground every day. There are 38 systems and 46 systems, which are generally related to the degree of mechanization. 46 systems are generally used for those with high degree of mechanization, which is more efficient. As for the underground temperature you mentioned, it depends on the specific place and the geological conditions of the mine. However, there are generally no four seasons underground, which are basically suitable for your work clothes.