DIN 14677-2 (2017-06)现行
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 2: Requirements To The Specialised Company
出版：German Institute for Standardisation (Deutsches Institut für Normung)
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