It is understood that at present as building stone stone type is more, mainly pebbles and rocks, around the store reserves are abundant, a widely distributed and has high economic. In terms of material, wear resistance, basalt is a commonly used stone construction of highway, railway, airport runway, the foundation of development of railway transportation…

First of all, the machine should avoid collisions, in order to ensure the machine clean, not to any corrosive chemicals. Secondly, mining machinery bearing shoulder the whole load of the machine, so the lubrication to a great extent, related to the bearing life, it directly affect the operation rate of the machine and the life…