Definitions for key, double tapper
This page provides all possible meanings and translations of the word key, double tapper
The Standard Electrical Dictionary
Key, Double Tapper
A telegraph key giving contacts alternately for currents in opposite directions, used in needle telegraphy.
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"key, double tapper." Definitions.net. STANDS4 LLC, 2014. Web. 20 Dec. 2014. <http://www.definitions.net/definition/key, double tapper>.