不淬硬钢和奥氏体不锈钢内螺纹圆柱销          
          Parallel Pins with Internal Thread, of Unhardened Steel and Austenitic Stainless Steel 
                      
          淬硬钢和马氏体不锈钢内螺纹圆柱销          
          Parallel Pins with Internal Thread, of Hardened Steel and Martensitic Stainless Steel 
                      
          内螺纹圆柱销          
          Parallel Pins with Internal Thread