... 2008. The applicability of market applications1.Municipal bridge, tunnel construction, in-situ flat-slab at the end of model ... scoreboard, large TV screen frame, lighting shelves, etc.;5.Scaffolding leasing business;6.The shipbuilding industry, military, civil aircraft maintenance ... dismantling ,high-level roof facilities repairment;8.Shed room, scaffolding, storage shelve puts up and so on.Ring lock ...