... codenamed "WA" the international general standards and national standard consistent, most for export, also have a certain amount ... , metal or non-metal surface dirt rust removal, such as gravity die mold, rubber mold of the oxide or from the ... artists. 4, pretreatment processing: TEFLON (TEFLON), PU, rubber, plastic coating, rubber barrels (ROLLER), electroplating, metal spray welding, plating titanium ...