1. Shell: light aluminum alloy shell shall be adopted which is light but hard and fit for the use in the terrible work environment with a high heat dissipation rate and all tightness design
2. Design: International advanced tide compact and nice.
3. Reduce: High strength hard gear surface, inclined gear driving with low noise.
4. Motor: Inside fit plane brake, double winding pole changing control motor, incorporate with reducer, suit higher classification.