4 ms·
With a sealing ring or gasket. Many patents for this concept exist: https://patents.google.com/?q=G04B39%2f02 https://patents.google.com/?q=G04B39%2f02
by 1970-01-01 4y ago
With a sealing ring or gasket. Many patents for this concept exist:
https://patents.google.com/?q=G04B39%2f02 https://patents.google.com/?q=G04B39%2f02