How It's Made Season 8 Episode 7 CO2 Cartridges, Pretzels, Scissor Lifts, Skating Rinks ( Air Date 2007-02-20 ) Genre Documentary category. 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.".
How It's Made Season 8 Episode 7 CO2 Cartridges, Pretzels, Scissor Lifts, Skating Rinks
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- Watch: How It's Made Season 8 Episode 7 CO2 Cartridges, Pretzels, Scissor Lifts, Skating Rinks on CWR-CRB
- Stars: Lynne Adams
- Director: Yanick Legrand, Yan Savard, François Senécal-Tremblay, Linda Boyle, Lynn Herzeg, Gabriel Hoss, Gabriel Hoss
