Season 14 Episodes13
Cast1

Lynne Adams
Narrator (voice)
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Ranked #7 of 13 in Season 14•matches the season avg
A flat-bottomed hull, powerful engine, large propeller and protective cage are combined to build an airboat capable of crossing shallow water and marshland. Onions are harvested, cured, graded and packed; metal powder is fused layer by layer from a digital design; and glued layers of

Lynne Adams
Narrator (voice)
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"Air Boats, Onions, 3D Metal Printing, Curved Cabinet Doors" is episode 12 of How It's Made season 14. It scored 7.4/10 from 17 votes, ranking #7 of 13 episodes this season (season average 7.4). It aired on December 18, 2009.