1890s Graves Hydropneumatic or Pressure Tank System . Vintage illustration from Special illustrated catalogue of the Graves Elevator Company, 1893. Illustrates the Elevator as well as the operating system.

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research provided that image to be a part of the public domain under local laws of original work, the United States of America, it is recommended to make sure that there are no restrictions for other legislations

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Size: 2972px × 2087px
Photo credit: © EMU history / Alamy / Afripics
License: Licensed
Model Released: No

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