refilling O2 bottles on the road.
No, I can't.
I go based on having Scott airpacks refilled for emergency use at manufacturing plants I have worked at in the past.
User manuals back then stated to refill with "breathing oxygen", thus my comment.
I thought part of that was humidity, but not sure.
If someone went to a decent supplier and asked for "breathing oxygen" and were told, "no difference", then fine.
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