Used for all kinds of high-quality characters, Seiko characters, mirror characters, sand steel characters, titanium characters, galvanized plate characters, aluminum three-dimensional characters, stainless steel mirror characters, stainless steel brushed characters, stainless steel spherical characters, stainless steel flat characters, stainless steel painted characters, stainless steel spray characters, stainless steel Solid characters, stainless steel electroplated characters, stainless steel gold foil characters, precision metal characters, titanium flat characters, titanium spherical characters, precision titanium characters, titanium plate characters, iron paint characters (stainless steel strips, iron strips, low carbon steel strips, galvanized strips) and other advertising words and various metal signs Welding forming of LED metal letter casing