... with GB/T700-1988) 4.ladder stand and steel bridge use steel tube ( diameter 48mm,thicker≥2.5mm accord with GB/ ... welding and co2 plastic parts : 1. slide,door ,drilling bridge ,roofs made from imported engineering LLDPE P;ASTIC (line low ... reasnable price ,innovation ,shipment on date componet consist slide ,roofs .bridge ,door , window,drillrange of applicationpark ,supermarket .shool,village and so ...