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This book takes the technological revolution and industrial changes as the background. The timeline uses the timeline to explain the path of changes in standard concepts since the millennium, showing the scientific system and gradually becoming the focus of the people.This book refers to the classics of a number of standard theories, introduces a number of standards and its theoretical content, and combines the industrial observation experience and typical cases accumulated by the author to put forward opinions on standards and standardization.As the awareness of standards gradually rooted in...