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・ Sparrow in the Treetop
・ Sparrow Initiative
・ Sparrow Lake
・ Sparrow McCaffrey
・ Sparrow Morton
・ Sparrow of the Circus
・ Sparrow pebblesnail
・ Sparrow Quartet
・ Sparrow Records
・ Sparrow Trout Heart Sprout
・ Sparrow Unit
・ Sparrow's Hotel
・ Sparrow's resolution limit
・ Sparkplug (comics)
・ Sparkplug (Transformers)
Sparkplug lighthouse
・ Sparkpr
・ Sparks
・ Sparks (Amtrak station)
・ Sparks (band)
・ Sparks (charity)
・ Sparks (Cover Drive song)
・ Sparks (drink)
・ Sparks (Fiction Plane album)
・ Sparks (film)
・ Sparks (Hilary Duff song)
・ Sparks (Imogen Heap album)
・ Sparks (name)
・ Sparks (novel)
・ Sparks (Röyksopp song)


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Sparkplug lighthouse : ウィキペディア英語版
Sparkplug lighthouse
In American usage, a sparkplug lighthouse, sometimes known as a bug light, is a type of caisson lighthouse so named because of its shape. Generally speaking, a sparkplug lighthouse consists of a three-story living area, with the lantern on top; the whole is then placed upon a concrete or metal caisson. The superstructure was usually prefabricated and then lifted onto the caisson by crane. The classic sparkplug light sits in open water, with only the caisson below it and no dry land, but the term is also applied to lights on land or pierheads that are constructed in the same fashion.
==Gallery==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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