Value transfer and traceability In - depth analysis of the core basic concepts in the field of metrology fundamentals. This article elaborates on the content, classification, and characteristics of metrology.In terms of content... Qualitative analysis and quantitative confirmationThe content of measurement In - depth analysis of metrology concepts: Verification, Calibration, Testing, Inspection and the assessment and accreditation of relevant institutions This article elaborates in detail on the concepts related to metrology, including verification, calibration, testing, and inspection... Calibration of measuring instrumentsDetermination of qualification status Clarify the essential differences, category classifications, and application analyses between the concepts of measuring tools and metrology. This article mainly expounds the essential differences between measuring tools and metrology. Measuring tools are measuring instruments with physical forms... Systematic scientific activitiesMeasuring tools and metrology