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It is amazing to think now how far the human creature can go investigating this world and its lows!

Could someone a hundred years ago possibly think about human travelling to the space? Could he imagine talking to his friend from another part of the world wireless?

Yes, the world has changed and changed forever.

And we probably do not notice in our daily life that we are still changing it, every minute, every second, every moment...

Thanks to development of science and technology we discover new things and improve old.

After this inspiring introduction I would like to turn to my present topic, namely, Ultra High Vacuum (UHV).