af2 on Nostr: I know certain tests have weaknesses (the xray machines only test the surface of the ...
I know certain tests have weaknesses (the xray machines only test the surface of the metal) but my understanding is that you combine several tests (ultrasound etc). There must be a way to determine it is legit, otherwise the market for selling used precious metal would be totally fucked.
Published at
2023-11-30 14:40:00Event JSON
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