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blade
A blade is the portion of a tool, weapon, or machine with an edge that is designed to cut and/or puncture, stab, slash, chop, slice, thrust, or scrape surfaces or materials. A blade may be made from a flaking stone, such as flint, metal (usually steel), ceramic, or other material. Blades are one of humanity's oldest tools, and continue to be used for combat, food preparation, and other purposes.
==Uses==
During food preparation, knives are mainly used for slicing, chopping, and piercing.
In combat, a blade may be used to slash or puncture, and may also be thrown or otherwise propelled. The function is to sever a nerve, muscle or tendon fibers, or blood vessel to disable or kill the adversary. Severing a major blood vessel typically leads to death due to exsanguination. Shrapnel wounds via the fragments' blade-like nature.
Blades may be used to scrape, moving the blade ''sideways'' across a surface, as in an ink eraser, rather than along or through a surface.
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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