hole punching sheet Metal plate hole size0.20-300mm ... materials: stainless steel low carbon steel galvanization coil etc. Cold PVC, Type: design, molding mesh mesh, mesh, ... such as sound of dustproof enclosures, etc.Punching plate is by all sorts of material stretching ... : stamping, outspread, Divided into: mesh, steel, aluminum, punching sieve net, loudspeaker meshes, such products widely used in chemical ...