Tightness-Testing
Dichtheitsprüfung_Stage(阶段)

 

 

01_Dichtheitsprüfung(中文)
Tightness Testing 1970s

Tightness Testing

 

 

 


02_Dichtheitsprüfung(中文)
Air bubble testing device 2018

Air bubble testing

 
 
03_Dichtheitsprüfung(中文)
Lead-sealing pliers and lead seal 2018

Sealing