1. The shearer runs smoothly with little vibration, which reduces the failure rate. And the service life of the machine is prolonged.

2. Multi-stage traction can be used to increase the traction to 400-600 kN (already at the maximum inclination angle of 54? )

3. The broken chain fault is eliminated and the safety is increased.

4. When the working face is long, multiple shearer can work at the working face at the same time.

My summary, the answer is not complete, please forgive me.