main-ram crosshead

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Ship — A ship IPA|/ʃɪp/ audio|en us ship.ogg|Audio (US) is a large vessel that floats on water. Ships are generally distinguished from boats based on size. Ships may be found on lakes, seas, and rivers and they allow for a variety of activities, such as … Wikipedia
Marine propulsion — For the operation of ship engines, see Engine department (ship). For the design of ships, see Naval architecture. A view of a ship s engine room Marine propulsion is the mechanism or system used to generate thrust to move a ship or boat across… … Wikipedia
Stevens Battery — The Stevens Battery was an early design for a type of ironclad, proposed for use by the United States Navy before the American Civil War. One full sized example was begun but never completed due to lack of funding. Background and Beginnings In… … Wikipedia
Multi-jackbolt tensioner — Multi jackbolt tensioners (MJT) provide an alternative to traditional bolted joints Rather than needing to tighten one large bolt, MJTs use several smaller jackbolts to drastically reduce the torque required to attain a certain preload. MJTs… … Wikipedia

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