How It's Made · SEASON 8
CO2 Cartridges, Pretzels, Scissor Lifts, Skating Rinks
Episode 7 · 2007-02-20

- Documentary
Episode overview
Small steel cylinders are formed, tested and filled with compressed carbon dioxide, shaped dough is boiled and baked into pretzels, hydraulic systems and crossed supports are assembled into scissor lifts, and layered refrigeration systems create and maintain artificial skating-rink ice.
21 minutes
Season 8 episodes
1. Photographs, Fur Tanning, Welding Electrodes, Electric Violins2007-01-02
2. Glass Bottles, Hacksaws, Ice Hockey Goalie Masks2007-01-09
3. Lacrosse Sticks, Frozen Fish Products, Flashlights, Paintbrushes2007-01-16
4. Deep-Cycle Batteries, Tins, Optical Lenses2007-01-23
5. Horseshoes, Dishwashers, Graphite Fly Rods, Frozen Pizzas2007-01-30
6. Pistons, Paint Rollers, Parachutes, Chimneys2007-02-06
7. CO2 Cartridges, Pretzels, Scissor Lifts, Skating Rinks2007-02-20
8. Pro Hockey Sticks, Bronzed Baby Shoes, Treadmills, Handheld Computers2007-02-27
9. Motorcycles, Clay Pipes, Drum Sticks, Whistles2007-03-06
10. Handcuffs, Caulking and Joint Compound, Propane Tanks, Forensic Facial Reconstruction2007-03-13
11. Fur Coats, Hearses, Outdoor Lighting Fixtures, Golf Tees2007-03-20
12. Fishing Reels, Miniature Houses, Kitchen Mixers2007-03-27
13. Manhole Covers, Range Hoods, Artificial Logs, Snowmobiles2007-04-03