DIN CLC/TS 50621
DIN CLC/TS 50621 Guideline for the repair of damaged installed optical fibre cables and microducts; German version CLC/TS 50621:2016
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/2017
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/2017