lace card

(Obsolete) A punched card with all holes punched (alsocalled a "whoopee card" or "ventilator card"). Card readerstended to jam when they got to one of these, as the resultingcard had too little structural strength to avoid bucklinginside the mechanism. Card punches could also jam trying toproduce these things owing to power-supply problems. Whensome practical joker fed a lace card through the reader, youneeded to clear the jam with a "card knife" - which you usedon the joker first.

单词	lace card
释义	lace card lace card (Obsolete) A punched card with all holes punched (alsocalled a "whoopee card" or "ventilator card"). Card readerstended to jam when they got to one of these, as the resultingcard had too little structural strength to avoid bucklinginside the mechanism. Card punches could also jam trying toproduce these things owing to power-supply problems. Whensome practical joker fed a lace card through the reader, youneeded to clear the jam with a "card knife" - which you usedon the joker first.
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