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・ SID
・ Sid
・ Sid & Al's Incredible Toons
・ Sid & Marty Krofft Television Productions Inc. v. McDonald's Corp.
・ Sid & Marty Krofft's Red Eye Express
・ Sid (band)
・ Sid (given name)
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Sickle
・ Sickle (disambiguation)
・ Sickle (horse)
・ Sickle barb
・ Sickle Cell Anemia, a Molecular Disease
・ Sickle Cell Disease Association of America
・ Sickle cell nephropathy
・ Sickle cell trait
・ Sickle cell-beta thalassemia
・ Sickle darter
・ Sickle Moon Peak
・ Sickle Mountain
・ Sickle Nunatak
・ Sickle of Minamá
・ Sickle Ridge


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Sickle : ウィキペディア英語版
Sickle

A sickle is a hand-held agricultural tool with a variously curved blade typically used for harvesting grain crops or cutting succulent forage chiefly for feeding livestock (either freshly cut or dried as hay).
A great diversity of types is used across many cultures. Between the dawn of the Iron Age and present, hundreds of region-specific variants of this basic forage-cutting tool were forged of iron, later steel.
One noteworthy feature of sickles is that their edges have been made in two very distinct manners/patterns - smooth or serrated. While both can (albeit with a different technique) be used for cutting either green grass or mature cereals, it is the serrated sickle that still dominates the duty of harvesting grain - with other words the "reaping". Modern kitchen knives with serrated edges, as well as grain-harvesting machines use the same design principle as prehistoric sickles.
== History ==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Sickle」の詳細全文を読む



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