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© 3M 2011. All rights reserved.
3M
™
SelfCheck
™
System R-Series Models 8420 and 8422 Owner’s Manual 78-8129-4301-3B
3M, Tattle-Tape, SelfCheck and Dual Lock are trademarks of 3M. Microsoft and Windows are registered
trademarks of Microsoft Corporation in the United States and other countries.
The original instructions in this document were written in U.S. English. All other languages are a
translation of the original instructions.