Plain ring gauge
                            
                              
                            
                            
                            
                            
                                                                  135-D001光滑极限环规  
                                                                 
                                                                  Plain ring gauge
                                                             
                                                         Made of Gcr15 tool steel
8G,6G sizes available
Standards: GB1957-81, DIN2245-89,ANSI/ASME B89.11.6m-84

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