Pipes and fittings of polypropylene (PP) for buried cable ducting – Dimensions and technical delivery conditions
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 04/01/2011
Pipes and fittings of polypropylene (PP) for buried cable ducting – Dimensions and technical delivery conditions
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/2017
