... Outdoor Physical exercise equipments: 1,Metal: National standard steel pipe, welded by the Japanese OTC robot welding system, ... outer is covered with polyamide fiber ropes, good intensity, abrasion resistance, corrosion resistance, safety performance, more than 15 years of safe use ... steel material (GB/T1221-1992).5,Painting: We use the painting flow line machine, well-mixed6,Usage: Residential ...