the bar (symbol bar) is a unit measuring pressure equivalent to 100,000 pascals[1]. the bar has the interest of being close to the atmosphere (average atmospheric pressure on the surface of the sea.) outside the international system (if,) this unit drifts from the bare (1 bar 1000 000 baryes,) pressure unit of the CGS system [2]. For more precision, the bar gauge (our barg) is sometimes referred to, with zero corresponding to atmospheric pressure, to distinguish it from the absolute bar (our bara) whose zero corresponds to the vacuum. wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww...
