... 3.We need drawings for the production 4. OEM carbon steel zinc plated precision machining parts, machining products 1.precision cnc ... , excellent R&D teams5. Strict quality control systemMaterial:Steel, stainless steel, aluminum, zinc, copper, brass, plastic etcMachining process:CNC machining, ... , Auto CAD (IGS, STP, STL and X-T) carbon steel zinc plated precision machining parts, machining products