Ainihin, kayan aikin injin kayan aiki ne na na'ura don jagorantar hanyar kayan aiki - ba ta hanyar kai tsaye ba, jagorar jagora, kamar kayan aikin hannu da kusan dukkanin kayan aikin ɗan adam, har sai mutane sun ƙirƙira kayan aikin injin. Ikon lambobi (NC) yana nufin amfani da dabaru na shirye-shirye (bayanai ta hanyar haruffa, lambobi, ...
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