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Summary Edit

Underfriction wheels, first patented by John A. Miller.

This photo can be found here >> http://en.wikipedia.org/wiki/File:Roller_coaster_wheels.jpg

Licensing Edit

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  • Underfriction

    On roller coaster trains, underfriction, up-lift, or up-stop wheels are a device to keep the...

File history

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Date/TimeThumbnailDimensionsUserComment
current16:47, April 20, 2012Thumbnail for version as of 16:47, April 20, 20121,600 × 1,200 (552 KB)Lachlan5963 (wall | contribs)Underfriction wheels, first patented by John A. Miller. This photo can be found here >> http://en.wikipedia.org/wiki/File:Roller_coaster_wheels.jpg

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