... 4. Economic Project name Nine Dragon Paper Dome Coal Storage ( 2 sets )type Bolted ball joint space frame ... rich primer +PU finishConstruction Outline Steel space frame ,encolsure system ,Embedded parts manufacturing (Non-embeded parts laying )Anti-rust ... for 50 years3. Fast and easy to install4.Extensive Applications: Storage, Warehouse, Exhibition Hall, Terminal Building, Stadium, Theater, Special ...