Originally, this referred to a small paper card with a question written on one side and the answer on the other.
它原指用纸做成的小卡片，正面问题背面答案。
Paper card timing records with signatures from employees monthly.
打卡钟打卡考勤记录，但需要员工每月在工卡上签名确认。
Paper card timing records with signatures from employees monthly.
打卡钟打卡考勤记录，但需要员工每月在工卡上签名确认。
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