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Certification and Licensing
List of Approved Nationally Recognized Testing Laboratories (NRTL)
| Underwriters Laboratories Inc. |
333 Pfingsten Road
Northbrook, IL 60062-2096
847-272-8800 |
| Wyle Laboratories, Inc. |
7800 Highway 20 West
P.O. Box 07777
Huntsville, Alabama 35807
256-837-4411 |
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