1 material:10#, 20#, 35#, 45#, 16Mn,Q345B 2 excutive standard:GB/T8162-1999 3 best quality Supply ... 10#, 20#, 35#, 45#, 16Mn,Q345B structure pipe GB/T8162-1999 Commodity nameMain materialUsageExecutive standardSpecification scopeStructure ... pipe10#,20#,35#,45#,16Mn,Q345B etcGeneral structure fabricationGB/T8162-1999 Φ 6-610×1-70 Part Specification List (mm)12×114×1 ...