DIN EN 61753-052-6:2017
光纤互连设备和无源元件 性能标准 第 052-6 部分:单模光纤非连接器固定衰减器 室外环境中的 O 类(IEC 61753-052-6:2016);德文版 EN 61753-052-6:2016
Fibre optic interconnecting devices and passive components - Performance standard - Part 052-6: Single-mode fibre non-connectorized fixed attenuator - Category O in outside plant environment (IEC 61753-052-6:2016); German version EN 61753-052-6:2016