Broadcasts.com - "Engines of Our Ingenuity 2911: Quincy Mine Hoist" (Engines of Our Ingenuity)

Published: Sept. 24, 2023, 5:01 a.m.

Episode: 2911 A very big spool: The Quincy Mine No. 2 Shaft Hoist, the largest in the world.\xa0 Today, a very big spool.