China brake drum
The appearance of China brake drum look like the drum of iron castings,on the surface of the China brake drum,has 4 grooves.
There many advantage of the grooves as follow:
1,it can overcome skid which soaked by the water or oil.
2,the grooves can improve the heat dissipation potention.
3,interdict the surface crack extention.
4,increase the brake drum life.
