national standard enhanced circular section(国标加强圆形款) national standard reinforced national standard triangle(国标加强国标三角形款) round economic style(圆形经济款)

1 ton 3 m(1吨3米) 1 ton 6 m(1吨6米) 2 tons 3 meters(2吨3米) 2 tons 6 meters(2吨6米) 3 tons 3 meters(3吨3米) 3 tons 6 meters(3吨6米) 5 tons 3 meters(5吨3米) 5 tons 6 meters(5吨6米) 1 ton 9 m(1吨9米) 2 tons 9 meters(2吨9米) 3 tons 9 meters(3吨9米) 10 tons 3 meters(10吨3米) 10 tons 6 meters(10吨6米)