Soviet Patents on Acoustical and Magnetic Measuring Instruments

Front Cover
U.S. Department of Commerce, Office of Technical Services, Joint Publications Research Service, 1962 - Measuring instruments - 400 pages
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Contents

A Geomagnetic Gradioneter
6
A Device for Raising or Lowering the Frequency of Harmonic
13
A Pectinate Filter
17

18 other sections not shown

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