الوصف

Conical twin screw and barrel teachnogy is a very perlect compoun*-dproduct of high hardness, wear-proof in common use recently, Its perfrmance is there times surpassed common materials. For the applications on cylinder and screw, with the merits to overcome easy-corroslon and puick-weamess, for the special plastics production, should use double-metal cylinder and screw, Its precessing method include spotspraying, frame plating, coveing, casting, soldering *@********************,