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  2. Mower blade - Wikipedia

    en.wikipedia.org/wiki/Mower_blade

    The first known lawn mower had a cylinder cutting gear made of iron. [citation needed] It was used to mow sporting grounds and wide-ranging gardens.As manufacturers changed the design and structure of mowers, the cutting mechanism also developed and evolved into several varieties, including cylinder/reel blades, deck blades, mulching blades, and lifting blades.

  3. Sharpness (cutting) - Wikipedia

    en.wikipedia.org/wiki/Sharpness_(cutting)

    Sharpened metal drop-point blade Naturally occurring sharp obsidian piece Shark tooth with a sharp, serrated edge A sewing needle comes to a sharp point. Sharpness refers to the ability of a blade, point, or cutting implement to cut through materials with minimal force, and can more specifically be defined as the capacity of a surface to initiate the cut. [1]

  4. Knife sharpening - Wikipedia

    en.wikipedia.org/wiki/Knife_sharpening

    Knife sharpener in Kabul, Afghanistan (1961) The Knife Grinder by Massimiliano Soldani (c.1700), Albertinum, Dresden A railway camp cook sharpens a knife blade on a stone wheel, 1927. Knife sharpening is the process of making a knife or similar tool sharp by grinding against a hard, rough surface, typically a stone, [1] or a flexible surface ...

  5. Classification of swords - Wikipedia

    en.wikipedia.org/wiki/Classification_of_swords

    The weight of an average sword of 70 cm (28 in) blade-length would weigh about 700 to 900 g (1.5 to 2.0 lb). [20] There are also larger two-handed versions used by ancient and medieval armies and for training by many styles of Chinese martial arts .

  6. Guntō - Wikipedia

    en.wikipedia.org/wiki/Guntō

    The blades found in shin guntō ranged from modern machine-made blades through contemporary traditionally-manufactured blades to ancestral blades dating back hundreds of years. After the Second World War's conclusion, most produced guntō were made to resemble the traditionally cloth wrapped shin-gunto swords, but out of a solid metal casting.

  7. Human tooth sharpening - Wikipedia

    en.wikipedia.org/wiki/Human_tooth_sharpening

    Human tooth sharpening is the practice of manually sharpening the teeth, usually the front incisors. Filed teeth are customary in various cultures. Filed teeth are customary in various cultures. Many remojadas figurines found in parts of Mexico have filed teeth and it is believed to have been common practice in their culture.