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  • VGA connector

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    A Video Graphics Array (VGA) connector is a three-row 15-pin DE-15 connector. The 15-pin VGA connector was provided on many video cards, computer monitors, laptop computers, projectors, and high definition television sets. On laptop computers or other small devices, a mini-VGA port was sometimes used in place of the full-sized VGA connector. Many devices still include VGA connectors, although VGA generally coexisted with DVI as well as the newer and more compact HDMI and DisplayPort interface connectors.

  • Sub-provincial division

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    A sub-provincial division () (or deputy-provincial divisions) in the People's Republic of China is like a prefecture-level city that is governed by a province, but is administered independently in regard to economy and law. Sub-provincial divisions, similar to prefectural-level divisions, an administrative unit comprising, typically, a main central urban area, and its much larger surrounding rural area containing many smaller cities, towns and villages. The mayor or chairman of a sub-provincial division is equal in status to a vice-governor of a province. Its status is below that of municipalities, which are independent and equivalent to provinces, but above other, regular prefecture-level divisions, which are completely ruled by their provinces. However, they are marked the same as other provincial capitals (or prefecture-level city if not provincial capital) in almost all maps.

  • Subwoofer

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    driver (loudspeaker). A driver is commonly installed in an enclosure (often a wooden cabinet) to prevent the sound waves coming off the back to cancel out the sound waves being generated from the front of the subwoofer. A subwoofer (or sub) is a woofer, or a complete loudspeaker, which is dedicated to the reproduction of low-pitched audio frequencies known as bass and sub-bass. The typical frequency range for a subwoofer is about 20–200 Hz for consumer products, below 100 Hz for professional live sound, and below 80 Hz in THX-approved systems. Subwoofers are intended to augment the low frequency range of loudspeakers covering higher frequency bands. While the term "subwoofer" technically only refers to the speaker driver, in common parlance, the term often refers to a subwoofer driver mounted in a speaker enclosure (cabinet). Subwoofers are made up of one or more woofers mounted in a loudspeaker enclosure—often made of wood—capable of withstanding air pressure while resisting deformation.

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