2020GB/T 9771.2-2020 Single-mode optical fibres for telecommunication—Part 2: Characteristics of a cut-off wavelength shifted single-mode optical fibre
2008GB/T 9771.2-2008 Single-mode optical fibres for telecommunication.Part 2:Charaterisics of a cut-off wavelength shifted single-mode optical fibre
2000GB/T 9771.2-2000 The series of single-mode optical fibres for telecommunication Part 2:Characteristics of a cut-off wavelength shifted single-mode optical fibre