div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: EN 50163 CEI EN 50122-1 CEI EN 60909-1 RFI — Specifiche Tecniche di interoperabilità europea RFI — Specifiche Tecniche ENE EMTP Theory Book src=https:reader031fdocumentsinreader031viewer20220215095b0b481e7f8b9aba628d9995html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdiv