Standard [CURRENT]
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This document has been modified by: NF C61-530-1/A1:2017-08-04; NF EN 60838-1/A1:2017-08-04 , NF C61-530-1/A2:2021-04-02; NF EN 60838-1/A2:2021-04-02 , NF C61-530-1/A11:2021-05-21; NF EN 60838-1/A11:2021-05-21