This part of GB/T6931 defines the terms, definitions and symbols of timing belts, pulleys and cogging tools. This section applies to synchronous belt drive applications. Note: Refer to Appendix C for terminology of main types of timing belts. 2 Terms, definitions and symbols of timing belt
GB/T 6931.3-2020 history
2020GB/T 6931.3-2020 Belt drives—Vocabulary—Part 3:Synchronous belt drives
2008GB/T 6931.3-2008 Belt drives vocabulaty.Part 3:Synchronous belt drives vocabulary