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ACK-ACK

ACK-ACK
ScnMaster
(slang) antiaircraft fire. It comes from the British telephone code AA, which is the abbreviation for antiaircraft. —SHSBC Binder 5 Approved Glossary
ACK-ACK
ScnTUEU
(slang) antiaircraft fire. It comes from the British telephone code AA, which is the abbreviation for antiaircraft.