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Suddenly collapsed about 5:30 p.m. on 2 July 1965, killing a Topeka man. [32] Long Shoal Bridge: Benton County, Missouri: United States 21 September 1965: Swinging suspension road bridge Faulty design and overload 3 killed Total collapse Collapsed after a 10-ton truck crossed the bridge, which had a 5-ton limit. Old bridge remains at bottom of ...
Marketed as "Weston Differential Pulley Blocks with Patent Chain Guides", the pulley had good sales, namely, 3000 sets in 9 months. It was displayed in 5 sizes—from 10 long hundredweight (510 kg) to 3 long tons (3,000 kg)—at the 1862 International Exhibition in London and received a medal for "original application, practical utility and ...
A lewis (sometimes called a lewisson) is one of a category of lifting devices used by stonemasons to lift large stones into place with a crane, chain block, or winch. It is inserted into a specially prepared hole, or seating , in the top of a stone, preferably above its centre of mass .
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A block and tackle [1] [2] or only tackle [3] is a system of two or more pulleys with a rope or cable threaded between them, usually used to lift heavy loads.. The pulleys are assembled to form blocks and then blocks are paired so that one is fixed and one moves with the load.
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