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Modern manual door closer Eclipse door spring and separate checking mechanism. A door closer is a mechanical device that regulates the speed and action of a door’s swing. [1] Manual closers store the force used to open the door in some type of spring and reuse it to close the door. Automatic types use electricity to regulate door swing behavior.
A Red Ball Express truck gets stuck in the mud during World War II, 1944. 1971 AM General M35A2 with winch and camouflage cargo cover. The 2 + 1 ⁄ 2-ton, 6×6 truck was a standard class of medium duty trucks, designed at the beginning of World War II for the US Armed Forces, in service for over half a century, from 1940 into the 1990s.
To comply with the practices of the European Union, the British Imperial ton was explicitly excluded from use for trade by the United Kingdom's Weights and Measures Act of 1985. [3] [4] The measure used since then is the tonne, equal to 1,000 kilograms. If still used for measurement, then the word "ton" is taken to refer to an imperial or long ...
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