servicing oxygen systems with nitrogen
would be a very bad thing.

What would it feel like to breathe nitrogen instead of oxygen or air? I
presume one would just get euphoric, pass out, and die, with nary a clue.

Jose
--
Quantum Mechanics is like this: God =does= play dice with the universe,
except there's no God, and there's no dice. And maybe there's no universe.
for Email, make the obvious change in the address.