There are also expectations about maintenance and some notion of a “standard” environment. For example, unmaintained firearms work less well (or fail) when expo

There are also expectations about maintenance and some notion of a “standard” environment. For example, unmaintained firearms work less well (or fail) when exposed to humid conditions. See also: https://www.nps.gov/subjects/museums/upload/10-01_508.pdf https://www.nps.gov/subjects/museums/upload/10-01_508.pdf