EVS-EN 50131-1:2006+A1:2009 Häiresüsteemid. Sissetungi- ja paanikahäire süsteemid. Osa 1, Üldnõuded = Alarm systems. Intrusion and hold-up systems. Part 1, General requirements
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URL: http://www.digar.ee/id/nlib-digar:211405
