IEC 61753-121-3:2010
光纤互连装置和无源元件性能标准.第121-3部分:U类非受控环境用单工及双工单模光纤和圆柱形套管结构连接器
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