In our daily life, we often see some standards issued by the International Organization for Standardization (IS0). The numbering of these standards usually begins with "en" followed by a series of numbers. So what do these numbers mean? In fact, these numbers represent the whole coding sequence of the standard, and each number represents a different meaning. Through the numbering of EN standards, we can quickly understand the classification and scope of standards and provide more convenient reference for our work.

With the continuous improvement of internationalization, EN standard has gradually become an important guarantee for product quality. EN standards are formulated by ISO, covering requirements in various fields, including technical specifications, quality control and safety inspection. Strict EN standards can ensure the safety, performance and quality of products, and also help to improve the competitiveness of products in the global market.

The implementation and application of EN standard is a global process. In general, the production and revision of EN standards are jointly completed by the International Organization for Standardization and national standardization organizations. The implementation of EN standard needs strict supervision and implementation to ensure that products meet the requirements of the standard. In practice, the content of EN standard needs to be adjusted according to the national conditions and actual conditions to meet the needs of different countries.