A multipart business form with a carbon tissue interleaf or an individual NCR (carbonless) business form.
中义包含复写功能的多联式的商业表格。
英语百科
Carbon tissue
Carbon tissue is a gelatin-based emulsion used as a photoresist in the chemical etching (photoengraving) of gravure cylinders for printing. This was introduced by British physicist and chemist Joseph Swan in 1864. It has been used in photographic reproduction since the early days of photography.