Hi, I'm a student intern at the University of Washington Mechanical Engineering Lab. What part was used for the through hole from inside the vacuum chamber to the vacuum gauge and tube fitting? 僕は日本語がよく読めないので英語で書いています。I hope that's ok.
Thank you for your comment. I'm sorry but I couldn't understand what you meant for through hole. This video is the general introduction of vacuum technology. If you meant vacuum flange, some types of flange are used for each purpose. ICF flanges are used for UHV and high-vacuum, and KF flanges are used for low-vacuum.