Hand Milling in Green Bank

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Hand Milling in Green Bank

Green Bank Machinist Harry Sipe watches carefully as he guides this milling machine painstakingly by hand. Computer-controlled milling machines now installed at Green Bank have sped up this process tenfold.

Credit: NRAO/AUI/NSF

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The National Radio Astronomy Observatory is a facility of the U.S. National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
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