Selection factors for major development methods

The main development of the roadway is the core of a mining method, and its choice is crucial in mine design. The choice of the main type of roadway to be developed is determined by the following conditions: (1) Surface topographic conditions. After not only to consider the ore from underground (or

How electronic lockers should be maintained

How should electronic lockers be maintained? Many customers do not know how to maintain electronic lockers, and some do not even know that electronic lockers need to be maintained. We need to brush our teeth every morning to get up. Although electronic lockers do not need to be maintained every da