the company drive shaft assembly all supporting Dongfeng mainframe loading, all parts are used in 40 of the material, forging and quenching and tempering heat treatment. Dongfeng matching, pure quality, from the professional! the company drive shaft assembly all supporting Dongfeng mainframe loading, all parts are used in 40 of the material, forging and quenching and tempering heat treatment. Dongfeng matching, pure quality, from the professional!