Definitions for key, double contact
This page provides all possible meanings and translations of the word key, double contact
The Standard Electrical Dictionary
Key, Double Contact
A key arranged to close two distinct circuits, holding the first closed until the second is completed. It is used for Wheatstone bridge work.
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"key, double contact." Definitions.net. STANDS4 LLC, 2014. Web. 28 Aug. 2014. <http://www.definitions.net/definition/key, double contact>.