非色散位移 meaning in English

nds non-dispersion shifted

The series of single - mode optical fibres for telecommunication part 1 : characteristics of a dispersion unshifted single - mode optical fibre
通信用单模光纤系列第1部分:非色散位移单模光纤特性
The series of single - mode optical fibres for telecommunication part 3 : characteristics of an extended wavelength band dispersion unshifted single - mode optical fibre
通信用单模光纤系列第3部分:波长段扩展的非色散位移单模光纤特性