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A clutch pencil (or leadholder) tends to use thicker leads (2.0–5.6 mm) and generally holds only one piece of lead at a time. A typical clutch pencil is activated by pressing the eraser cap on the top, to open the jaws inside the tip and allow the lead to freely drop through from the barrel (or back into it when retracting).
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Intel 80186 in QFJ68 / PLCC68, an example of a plastic leaded chip carrier. In electronics, a chip carrier is one of several kinds of surface-mount technology packages for integrated circuits (commonly called "chips").
Before the development of dedicated pencil sharpeners, a pencil was sharpened by whittling with a knife.. The development of pencil sharpeners began in France when a French book from 1822 reported in detail about an invention of Mr. C. A. Boucher (Paris) for the construction of a pencil sharpener.
Joseph Dixon (1799–1869) was an inventor, entrepreneur and the founder of what became the Dixon Ticonderoga Company, a well-known manufacturer of pencils in the United States.
19th-century needlecase of bone, lead, wood, glass pearls, amber, leather, bronze, and iron. Nivkh or Evenki people, Amur River basin, Russia.. A needlecase or needle case is a small, often decorative, holder for sewing needles.
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The following other wikis use this file: Usage on als.wikipedia.org Computer; Usage on an.wikipedia.org Maquina d'Antiquitera; Usage on ar.wikipedia.org
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