DictionaryForumContacts

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 English thesaurus
Normally Open
abbr., electr.eng. 1A-1 (Interex)
abbr., scottish N/O
normally open
abbr. no.; nopn
abbr., mil., WMD n.o. (contact)
Normally Open: 3 phrases in 3 subjects
Earth sciences1
Mechanic engineering1
Transport1