This standard specifies the terms and definitions, symbols and descriptions, technical requirements, inspection methods, inspection rules, signs, Encasement, transportation and storage of pure bending fatigue testers. Applicable to swirl/spin bending fatigue test of metal materials under room temperature and high temperature test conditions, in accordance with the methods specified in GB/T4337. Applicable to general test conditions, but also to special conditions, such as corrosion medium and special environment atmosphere of the tester, but these special conditions are not specified. A number of specification documents are cited, including general technical requirements for testing machines, fatigue test swirl/spin bending methods for metal materials, etc. Symbols, units and descriptions are detailed in the table in the standard.