How It's Made
Railway Bridge Ties/Membrane Filters/Bi-Planes
Season 22 Episode 4 of 26
More everyday items are put under the microscope as the series reveals how membrane filters, bridge ties, and bi-planes are made
How It's Made airs on Discovery Channel HD at 11:00 AM, Saturday 21 September. (Subtitles.)
Learn more about How It's Made and other education/science/factual topics on our factual page
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