As an industrial specialist term, sure. I'm not sure if you've noticed but the term "off-gassing" now has a more general meaning & life of its own outside of that domain. I've heard people use it for situations up to and including stinky clothes and flatulence over the last few years.

They mean the same. Aerospace commonly uses offgassing too: https://www.nasa.gov/centers/wstf/testing_and_analysis/mater...