
Luminous Call Systems - Installations In Hospitals, Nursing Homes And Similar Institutions, Erection And Operation
出版:Verband Deutscher Elektrotechniker

专家解读视频
91 [01/04/1991]DRAFT 89
DIN VDE 0834 : 1991 - Identical
DIN 57834 : 1982 - Corresponds
DIN VDE 0834 : 1991 - Identical
DIN VDE 0834 (1991-04) - Identical