... long life,high speed,high quality 3.NBR co, steel material helical-spur gear, pinion and rack transmission gearWe can ... ,specializing in non-standard items. Feathure:1. Material: stainless steel steel alloy steel and brass etc2. Processing:forged,casting,heattreatment,or ... analysis, Meeting discussing, program auditing, PC & QC. Material :carbon steel such as C45,20CrMnTi,40Cr,42CrMo or stainless ...