ACTUALITY AND DEVELOPMENT TENDENCY ABOUT VACUUM METROLOGY
 
                 
                
                    
                                        
                    - 
Graphical Abstract
 
- 
Abstract
    The contents about vacuum metrology,vacuum standard,vacuum measuremen t and calibration and space vacuum measurement,etc.are introduced.On the basis o f the actuality of vacuum metrology,the development tendency of vacuum metrology is put forword.
 
- 
                          
-