@fafo ok the overly curious non industrial person/office worker looked up the words. And looked at the other comments, but I still don’t understand why it would say prohibited water boot? Please explain.
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I think this is a _very_ weird way to say "don't turn on without water inside/in the circuit". I suspect that the reason for the weird phrasing is that it was written by someone who didn't know English apart from technical vocabulary (so knew how to say anhydrous, and used "boot" in the sense of "booting").
@robryk @fafo thank you !!!!