... .2 mm steel. 3,Metal: National standard steel pipe, welded by the Japanese OTC robot welding system, strong and smooth, no ... bright for long.4,Plastic: Imported LLDPE from South Korea, by microcomputer control of four stations roll-plastic equipment, rolled into ... ,non-toxic,the quality passed all similar products.5,Deck: Formed by Cold-rolled steel plate punching with the thickness of 2 ...