采用特殊硅锰钢合金锻造而成+更耐磨的材质及更深层的热处理，

经过调质、中频淬火、回火等热处理工艺，确保硬度及特殊密封性。

Forged from special silicon-manganese steel alloy +More wear-resistant material and deeper heat treatment .

After quenching and tempering, quenching medium frequency, tempering 

and other heat treatment processes to ensure hardness  and Special seals.