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Standard for Signaling Devices for the Hearing Impaired

UL Revision
Standard 1971, Edition 3 Edition Date: July 20, 2005 $254.00
Summary of Topics s1971_3_sum.html


This revision to ANSI/UL 1971 includes Revision to the Signal Strength and Format Test to Address LED Strobes.

Back to Standard 1971, Edition 3

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