4-8-8-4 Big Boy Front/ Back Drive Wheel - Union Pacific "Big Boy" 3d model
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4-8-8-4 Big Boy Front/ Back Drive Wheel  - Union Pacific "Big Boy"

4-8-8-4 Big Boy Front/ Back Drive Wheel - Union Pacific "Big Boy"

by GrabCAD
Last crawled date: 1 year, 11 months ago
This is the Front / Back drive wheel for both of the "Big Boy's articulated engines.

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