| 78% helium, 21% oxygen, 1% carbon monoxide, rest: rare gases |
| 78% nitrogen, 21% oxygen, 1% carbon monoxide, rest: rare gases |
| 78% helium, 21% oxygen, 0,03% carbon dioxide, rest: rare gases |
| 78% nitrogen, 21% oxygen, 0,03% carbon dioxide, rest: rare gases |
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