BS-EN-61643-21 › Complete Document History
Assistive listening devices and systems for active assisted living
Complete Current Edition: |
2001/A2 EDITION - 2001 EDITION/AMENDMENT 2 INTERFILED - May 1, 2013
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Obsolete Revision Information: |
2001 EDITION AMENDMENT 1 - AMENDMENT 1 FOR 2001 EDITION - Jan. 1, 2010
2001 EDITION - REQUIREMENTS and TESTING METHODS - Aug. 31, 2001 |