UNE-EN IEC 61977:2020 Fibre optic interconnecting devices and passive components - Fibre optic fixed filters - Generic specification (Endorsed by Asociación Española de Normalización in July of 2020.)
2020UNE-EN IEC 61977:2020 Fibre optic interconnecting devices and passive components - Fibre optic fixed filters - Generic specification (Endorsed by Asociación Española de Normalización in July of 2020.)