... center dis:1.4-70 perforated metal :Materials: stainless steel mesh, aluminum, copper, steel board, PVC filmType: long, round ... the scales, bridge type hole, lozenge hole, the hole, tureet character, holes, cross hole hole hole, plum, nails, and other ... , punching, porous plate, simple perforation plate, horn, speakers, mesh, filtering, and its shape stamping composition design, and can accomplish ...