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Stoplogs are typically long rectangular timber beams or boards that are placed on top of each other and dropped into premade slots inside a weir, gate, or channel. Present day, the process of adding and removing stoplogs is not manual, but done with hydraulic stoplog lifters and hoists. [1] Since the height of the barrier can only be adjusted ...
Star lifting. Star lifting is any of several hypothetical processes by which a sufficiently advanced civilization (specifically, one of Kardashev-II or higher) could remove a substantial portion of a star 's matter which can then be re-purposed, while possibly optimizing the star's energy output and lifespan at the same time.
Left Coast Lifter. Left Coast Lifter is a floating derrick barge or sheerleg which was built to assist in the eastern span replacement of the San Francisco–Oakland Bay Bridge. The barge carries a shear legs crane which is the largest barge crane ever used on the U.S. West Coast. The barge's name is taken from "Left Coast", a slang phrase that ...
Floodgate. Floodgates, also called stop gates, are adjustable gates used to control water flow in flood barriers, reservoir, river, stream, or levee systems. They may be designed to set spillway crest heights in dams, to adjust flow rates in sluices and canals, or they may be designed to stop water flow entirely as part of a levee or storm ...
1963. ( 1963) –1968. ( 1968) Number built. 285. The Lockheed C-141 Starlifter is a retired military strategic airlifter that served with the Military Air Transport Service (MATS), its successor organization the Military Airlift Command (MAC), and finally the Air Mobility Command (AMC) of the United States Air Force (USAF).
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The Boeing Dreamlifter, officially the 747-400 Large Cargo Freighter ( LCF ), is a wide-body cargo aircraft modified extensively from the Boeing 747-400 airliner. With a volume of 65,000 cubic feet (1,840 m 3) [1] it can hold three times that of a 747-400F freighter. [2] The outsized aircraft was designed to transport Boeing 787 Dreamliner ...
Hydraulic tappet. A hydraulic tappet, also known as a hydraulic valve lifter or hydraulic lash adjuster, is a device for maintaining zero valve clearance in an internal combustion engine. Conventional solid valve lifters require regular adjusting to maintain a small clearance between the valve and its rocker or cam follower.
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