variable-polarity

variable-polarity
знакопеременный

Большой англо-русский и русско-английский словарь. 2001.

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  • VPPA — Variable Polarity Plasma Arc Contributor: CASI …   NASA Acronyms

  • Research Center for Advanced Manufacturing — Mission= Also known as the RCAM, the mission of the center is to promote and apply university led advanced manufacturing research and development work. In order to respond to the industry s needs and to provide the conditions to educate… …   Wikipedia

  • VPPA — abbr. Variable Polarity Plasma Arc …   Dictionary of abbreviations

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  • Electronic amplifier — A practical amplifier circuit An electronic amplifier is a device for increasing the power of a signal. It does this by taking energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. In… …   Wikipedia

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  • electronics — /i lek tron iks, ee lek /, n. (used with a sing. v.) the science dealing with the development and application of devices and systems involving the flow of electrons in a vacuum, in gaseous media, and in semiconductors. [1905 10; see ELECTRONIC,… …   Universalium

  • Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry       The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …   Universalium

  • List of current systems for electric rail traction — This a list of the power supply systems that are, or have been, used for tramway and railway electrification systems. Note that the voltages are nominal and vary depending on load and distance from the substation. Many modern trams and trains use …   Wikipedia

  • Plate tectonics — The tectonic plates of the world were mapped in the second half of the 20th century …   Wikipedia


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