1,40 years experience 2,advanced technical equipment 3,riched engineers 4,design and manufacture as per client's request we have more than 40 years experience in this industry specially for cement machinery,such as gear ringMaterial:Carbon steel,low alloy steel:ZG20SiMn,ZG50Mn,ZG35SiMn,ZG35CrMo,ZG35SiMnMo,ZG42CrMo,ZG40Cr,ZG34CrNiMo,ZG40Mn and so on. Process:Place a pattern in sand to create a ...