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Open Vs. Sealed
The rubber ball in the mechanical mouse causes dirt to collect inside. It must be removed, and the internal contacts must be cleaned periodically. Optical mice eliminated this requirement because their undersides are sealed. The arrow on this optical mouse points to the 848 nm laser.
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All other reproduction is strictly prohibited without permission from the publisher.
Copyright © 1981-2010 by Computer Language Company Inc. All rights reserved.
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