... work platform,such as building,hall,bridge,viaduct,tunnel,etc. ( 2)using for inside and outside scaffolding fence. (3)using ... pipe(tank)installation and maintenance industry,power generation,iron and steel industry,blast furnace,chimney and pipeline maintenance. (7)using ... special variety of athletic frames,large scoreboard,large TV screen frame,light shelves,etc. (8)using for shipbuilding industry, ...