töökindlus tähendus null.

reliability [reliabilities]▼◼◼◼noun
[UK: rɪ.ˌlaɪə.ˈbɪ.lɪ.ti] [US: ri.ˌlaɪə.ˈbɪ.lə.ti]

safety [safeties]▼◼◼◻noun
[UK: ˈseɪf.ti] [US: ˈseɪf.ti]