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HN 2
 HN2
abbr. chem. nitrogen mustard
 | AsCl
 ASCL
abbr. Advanced Systems Concept Laboratory; Association of School and College Leaders
abbr. el. advanced sonobuoy communications link
abbr. mil. avia. advanced sonobuoy communication link

HN2
abbr., chem. nitrogen mustard
O&G high pressure nitrogen

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