... sample is made before mode-making on the basis of the appearance of the product or structure drawing, to detect whether ... Nylon3) Aluminum, copper, zinc,Brass, stainless steel,sheet metalFunctions of prototype(1) Inspecting layout Prototype is visible and tangible, which ... and large-size sheet metal components4) Lathe for standoff, pin and shaft parts5) Die-casting for small batches*Stereo lithography ...