In the international standard classification, material testing and testing involve non-destructive testing, insulation materials, building materials, packaging materials and auxiliary materials, comprehensive testing conditions and procedures, comprehensive medical science and health devices, items and materials in contact with food, surface treatment and coating, building structures, road vehicle devices, and metal material testing In the Chinese standard classification, material testing and detection involve metal non-destructive testing methods, insulation, sound absorption, lightweight and fireproof materials, testing machines and non-destructive testing instruments, comprehensive technology, marking, packaging, transportation, storage, cables and their accessories, optical communication equipment, electrical insulation materials and their products, marking, packaging, transportation, storage, concrete, aggregates, mortar, mortar Port communication and navigation