2020GB/T 9771.1-2020 Single-mode optical fibres for telecommunication—Part 1: Characteristics of a dispersion unshifted single-mode optical fibre
2008GB/T 9771.1-2008 Single-mode optical fibres for telecommunication.Part 1:Characteristics of a dispersion unshifted single-mode optical fibre
2000GB/T 9771.1-2000 The series of single-mode optical fibres for telecommunication Part 1:Characteristics of a dispersion unshifted single-mode optical fibre