... , etc. Type: finite, lozenge square hole hole, holes, round hole, hexagons, cross hole hole hole, long round hole, triangle, waist, plum, holes, pattern ... board with the ceiling, wall of building acoustics meshes, suction loudspeaker meshesSound material, can be used ... into: mesh, steel, aluminum, punching sieve net, loudspeaker meshes, such products widely used in chemical machinery, pharmacy, food ...