What is a dive watch? what is the history behind? how is the bezel used? what is a gas escape valve?
0:00 Introduction
1:04 History
2:43 What is a dive watch
5:04 What is a bezel
5:50 Helium escape valve
Негізгі бет Ғылым және технология Everything about dive watches (eng.sub)
Пікірлер: 37