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Originally Posted by mkpdavies
Quote:
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Originally Posted by Besoeker
Quote:
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Originally Posted by mkpdavies
So where can I get the PPM quantities of O throughout time. It's important, yet doensn't seem to be out there at all.
I wonder why.
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PPM for O2 would be a totally inappropriate measure. |
Why? |
OK
It can be experssed as 21%
Or as 210,000.00 ppm.
Ho hum..........