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6 relations: Dam, Fall line, Lock (water navigation), River, Ship, Waterfall.
Dam
A dam is a barrier that stops or restricts the flow of water or underground streams.
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Fall line
A fall line (or fall zone) is the geomorphologic break that demarcates the border between an upland region of relatively hard crystalline basement rock and a coastal plain of softer sedimentary rock.
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Lock (water navigation)
A lock is a device used for raising and lowering boats, ships and other watercraft between stretches of water of different levels on river and canal waterways.
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River
A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river.
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Ship
A ship is a large watercraft that travels the world's oceans and other sufficiently deep waterways, carrying passengers or goods, or in support of specialized missions, such as defense, research and fishing.
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Waterfall
A waterfall is a place where water flows over a vertical drop or a series of steep drops in the course of a stream or river.
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