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Pencils with sub-millimeter leads can usually hold multiple leads at the same time, reducing the frequency of refills. One exception was the Pentel 350 E, possibly Pentel's first mechanical pencil, [14] which could only hold a single stick of 0.5 mm lead. Refill leads can be bought in small tubes and inserted into the barrel as needed.
Hypodermic needles are normally made from a stainless-steel or Niobium tube [17] through a process known as tube drawing where the tube is drawn through progressively smaller dies to make the needle. The end of the needle is bevelled to create a sharp pointed tip, letting the needle easily penetrate the skin. [18] A hypodermic needle tip under ...
Close up of an extra fine roller ball pen next to something written with it. There are two main types of roller ball pens: liquid-ink pens and gel-ink pens.The "liquid-ink" type uses an ink and ink-supply system similar to a fountain pen, and they are designed to combine the convenience of a ballpoint pen with the smooth "wet ink" effect of a fountain pen.
Windows 7 is a major release of the Windows NT operating system developed by Microsoft.It was released to manufacturing on July 22, 2009, and became generally available on October 22, 2009. [10]
This is an accepted version of this page This is the latest accepted revision, reviewed on 13 January 2025. Capital city of China "Peking" redirects here. For other uses, see Beijing (disambiguation) and Peking (disambiguation). Capital and municipality in China Beijing 北京 Peking Capital and municipality Beijing Municipality Beijing central business district with the China Zun (center ...
Polyester fibres are widely used in the textile industry. The invention of the polyester fibre is attributed to J. R. Whinfield. [9] It was first commercialized in the 1940s by ICI, under the brand 'Terylene'. [10]
A cable needle is a special type of double-pointed needle that is typically very short and used to hold a very small number of stitches temporarily while the knitter is forming a cable pattern. They are often U-shaped, or have a U-shaped bend, to keep the held stitches from falling off while the primary needle is being used.
Skype (/ s k aɪ p /) is a proprietary telecommunications application operated by Skype Technologies, a division of Microsoft, best known for IP-based videotelephony, videoconferencing and voice calls.