Thread ring gauge
                            
                              
                            
                            
                            
                            
                                                                  135-B001螺纹环规  
                                                                 
                                                                  Thread ring gauge
                                                             
                                                         Made of Gcr15 tool steel
8G,6G sizes available
Standard: DIN13-89, DIN2285-89,DIN299-89,ISO1502-96

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