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Maintenance of electrically controlled hold-open systems for fire and smoke door assemblies as well as for electrically controlled hold-open systems for fire barriers in the course of ground-bound conveying systems – Part 1: Maintenance measures
Deutsches Institut Fur Normung E.V. (German National Standard) , 08/01/2018
DIN 14677-1 PDF
Maintenance of electrically controlled hold-open systems for fire and smoke door assemblies as well as for electrically controlled hold-open systems for fire barriers in the course of ground-bound conveying systems – Part 1: Maintenance measures