2020GB/T 9771.4-2020 Single-mode optical fibres for telecommunication—Part 4: Characteristics of a dispersion shifted single-mode optical fibre
2008GB/T 9771.4-2008 Single-mode optical fibres for telecommunication.Part 4:Charaterisics of a dispersion-shifted single-mode optical fibre
2000GB/T 9771.4-2000 The series of single-mode optical fibres for telecommunication Part 4:Characteristics of a dispersion shifted single-mode optical fibre