perforated metal Metal plate punching thickness0.05-10.00mm hole size0.20-300mm hole patternMesh, stainless steel meshMesh refers ... mesh, etc. Type: finite, lozenge square hole hole, holes, round hole, hexagons, cross hole hole hole, long round hole, triangle, waist, plum, holes, pattern scales ... building generator room wall, objects, and other factory, the noise source of sound insulation, noise can ...