VCSE-B(Ⅱ)manufacture of vacuum comparison standard device
 
                 
                
                    
                                        
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Graphical Abstract
 
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Abstract
    VCSE-B(Ⅱ) Standard device of Vacuum Comparison is a complex vacuum device.It is composed of comparison unit and expansion unit,The specialities of this device are concise framework,convenient Oper-ation,efficient calibration,wide measument range,The principle key technical difficuties in development and manufacture adjustment and error analysis are introduced.
 
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