Technology and Operations  
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RE: sonar?
Posted by: bernard zimmermann ()
Date: November 11, 2000 02:32PM

It was actually invented before WW2.

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Subject Written By Posted
sonar? tony 11/11/2000 10:22AM
RE: sonar? Anders Wingren 11/11/2000 01:57PM
RE: sonar? bernard zimmermann 11/11/2000 02:32PM
RE: sonar? Ron C 11/24/2000 09:49PM


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