Mechanical Equipment Room.
Entrance into the Mechanical Equipment Room above the Cyclotron Facility (5/11/2011).
Image Credit: NASA/MARVIN SMITH
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https://www.nasa.gov/image-detail/grc-2011-c-01254/
TakenMay 11, 2011
Image CreditNASA/MARVIN SMITH
Size2656x1767px