Stock Photo: Ventilating a mine. Hollow drum with air holes, B, at opposite sides, mounted on an axle, C, to which are fixed fans rotating inside the drum. Axle turned by water wheel through a spur gear and lantern.

1746-1911 Rights Managed
  • Model Release: No
  • Property Release: No

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Super High
  • 11.05" x 11.73"
  • 300 dpi
  • 33.36MB
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