ANSWERS: 2
  • ... in a military training session to make sure we know how to put them on ... ... I have worn and used "Scott Air Packs" while working in poison gas leaking oil drilling rigs ... with lots of H2S in the air.
  • Only once a few days after we reached Peru, we went out for some touring and got caught up in a horrible police riot. Fortunately we got into a shop and they had the masks so we just bought and used them. Regards.

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