Sandberg Serrell Automated Balance Calibration Machine
Closeup view of weight pans of Sandberg Serrell machine showing weight pans with various weights for each six gages (weight pans no longer used and are in locked position).
Image Credit: NASA
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https://www.nasa.gov/image-detail/732468main_sandbergserrell67-576_full/
Image CreditNASA
Size576x432px