Fibre optic interconnecting devices and passive components - Performance standard - Part 121-3: Simplex and duplex cords with single-mode fibre and cylindrical ferrule connectors for category U - Uncontrolled environment (IEC 61753-121-3:2010); German version EN 61753-121-3:2010
纤维光学互连器件和无源元件.性能标准.第121-3部分:U类单模光纤和圆柱形套圈连接器的单工和双工跳线.非受控环境(IEC 61753-121-3-2010);德文版EN 61753-121-3:2010