In nowadays， Sartorius and Thermo have the bag integrity tester for test the capacility of the single use bag. But as I see the Sartorius is more professional than Themro Fisher.

As I was young, my dream is bocome a physical scientist， but the truth is not meet my mind. I become a biological technical engineer, but I'm not regret for my decision. As the same way, I  embody my value to the society, I vote my energy to do the significativ things. I'm very thanks for the living life and all the person who helped me. 

At last, I wish that all the puber can do the significativ things which is he/her loved. tnahk you bye !