Double Threaded Screw

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Double threaded screw.

Galleries

Screws

Source

Claude Irwin Palmer Library of Practical Electricity: Practical Mathematics For Home Study (New York: McGraw-Hill Book Company, Inc., 1919) 31

Downloads

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2400×2025, 323.6 KiB

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640×540, 33.1 KiB

Small GIF

320×270, 15.1 KiB