Main equipment at underground coal mine working face.Through the optimization of the structure and the improvement of the material heat treatment process, it is more suitable for the fully mechanized mining face with large mining and high output. ZMJ could provide 1m-9m shaerer for our client. ZMJ had provided 4m longwall system for Merge mine at south kalimantan, 4.5m longwall system for Qinfa coal mine at south kalimantan.