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Title: One pair of screw wheels in gear or sometimes called a heli [Go to resource]
Description: One pair of screw wheels in gear or sometimes called a helical worm and pinion; having involute tooth form. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: Screw wheels Temporal: c. 1883 Source: Science Museum Creator: Blackburn & Attenborough Identifier: 1885-198 Go to resource More Like this...
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