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The new specialty hinge section includes slipjoint hinges plus an expanded line of 40 different spring hinges. Continuous hinges are stocked in 24, 36, 48, 72, 84, and 96-in. lengths in plain steel, ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...