zone punch

listen to the pronunciation of zone punch
İngilizce - Türkçe
bölge delgisi
(Elektrik, Elektronik) bölge deliği
İngilizce - İngilizce
A hole punched (normally in the top two or three positions) of a punched card in addition to another in order to designate a different (sometimes related) character or to add a plus or minus sign
zone punch