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Alarm systems for fire, intrusion and hold-up - Part 4-1: Active loudspeakers
German title
Gefahrenmeldeanlagen für Brand, Einbruch und Überfall - Teil 4-1: Aktivlautsprecher
Publication date
2018-12
Original language
German
Pages
58
Procedure
Pre-Standard
Publication date
2018-12
Original language
German
Pages
58
Procedure
Pre-Standard
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