UNE-EN 60153-2:2016 Hollow metallic waveguides - Part 2: Relevant specifications for ordinary rectangular waveguides (Endorsed by AENOR in October of 2016.)
2017UNE-EN 60153-2:2016/AC:2017-02:2017 Hollow metallic waveguides - Part 2: Relevant specifications for ordinary rectangular waveguides (Endorsed by Asociación Española de Normalización in March of 2017.)
2016UNE-EN 60153-2:2016 Hollow metallic waveguides - Part 2: Relevant specifications for ordinary rectangular waveguides (Endorsed by AENOR in October of 2016.)