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前言CY1－91《书刊印刷产品分类》是1991年发布实施的行业标准。根据忡华人民共和国标准化法》和国家质量技术监督局的要求，经新闻出版署批准，对其进行修订。本标准对原标准主要有以下修订。①由于印刷技术的发展和客户对某些印刷品的特殊要求，出现了使用二种以上印刷方式（
Foreword CY1-91 “Book Printing Product Classification” is an industry standard released in 1991. According to the requirements of the Standardization Law of the People’s Republic of China and the National Bureau of Quality and Technical Supervision, it was revised by the Press and Publication Administration. This standard mainly includes the following amendments to the original standard. 1 Due to the development of printing technology and the customer’s special requirements for certain printed matters, two or more types of printing methods have emerged (