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Title: Everett Edgcumbe master frequency meter, model IV [Go to resource]
Description: Everett Edgcumbe master frequency meter, model IV License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: standard clock
master frequency meter
synchronous clockSource: Science Museum Creator: Everett, Edgcumbe and Company Ltd. Identifier: 1932-618 Go to resource More Like this...
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