Season 12, Episode 4 Railway Bridge Ties; Membrane Filters; Hydraulic Post Drivers; Bi-Planes

First Aired: April 24, 2014

Railway bridge ties; membrane filters; hydraulic post drivers; biplanes.

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Thursday
May 12
6:30am
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  • Premiered: January 6, 2001
  • Rating: TV-G
  • Premise: A series that shows how familiar objects used in everyday life are made. (more)

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