8. Fire Extinguishers, Doughnuts, Shock Absorbers, Banjos
Aired: 7/8/2008
Metal cylinders are formed, tested and filled to create fire extinguishers, rings of dough are fried and finished into doughnuts, pistons and hydraulic components are assembled into automotive shock absorbers, and wooden rims, stretched membranes and strings are combined into banjos.