This Standard specifies the requirements and inspection methods for parts and assemblies of the mechanical watch movements. This Standard applies to parts and a

This Standard specifies test principle, instruments and reagents, sampling and preparation of sample, test steps, test result calculation and allowable deviatio

This Standard specifies metallographic method, magnetic method, chemical composition method in determination methods of ferrite content in austenitic stainless-

This Standard specifies the types, service quality requirements and service quality evaluation of logistics public information platform. This Standard is applic

This Part of GB/T 29723 specifies the terms and definitions, basic requirements, calculation methods of energy consumption indexes, grade division and limit of