... .We need drawings for the production 4. OEM carbon steel zinc plated precision machining parts, machining products 1.precision ... turning, drilling, planning, welding, laser cuttingSurface treatment:Polishing, chrome/zinc/nickel plating, power coating, anodize, E-coatingApplicable industry:These ... , Auto CAD (IGS, STP, STL and X-T) carbon steel zinc plated precision machining parts, machining products