How Do They Do It? Season 12 Episode 8 Harp Strings, Roof Windows, Belgian Waffles ( Air Date 2015-07-03 ) Genre Documentary category. Overview "Making the world's finest harp strings; Building roof windows that can keep out a hurricane; Making Belgian waffles.".
How Do They Do It? Season 12 Episode 8 Harp Strings, Roof Windows, Belgian Waffles
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