IEC 61753-052-6:2016
纤维光学互连器件和无源元件. 性能标准. 第052-6部分: 单模非连接化固定衰减器. 户外装置环境下的O类
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