secondary power supply
121Industrial history of the People's Republic of China — Main articles: Economy and economic history of the People s Republic of China. China s industrial sector has shown great progress since 1949, but in the late 1980s it remained undeveloped in many respects. Although the country manufactured… …
122Alternating current — (green curve). The horizontal axis measures time; the vertical, current or voltage. In alternating current (AC, also ac) the movement of electric charge periodically reverses direction. In direct current (DC, also dc), the flow of electric charge …
123Newburgh (town), New York — Newburgh   Town   J. Malone Bannan Center, the town hall, named for a former (1967 1978) town supervisor …
124Energy crisis — An energy crisis is any great bottleneck (or price rise) in the supply of energy resources to an economy. It usually refers to the shortage of oil and additionally to electricity or other natural resources. An energy crisis may be referred to as… …
125Flyback transformer — A flyback or line output transformer (FBT or LOPT) is a type of transformer used in the power supply of a cathode ray tube that generates the high voltage needed to drive a CRT type monitor, and can also be used to power a plasma globe. It… …
126List of companies in the nuclear sector — Here is a list of all large companies which are active along the nuclear chain, from uranium mining, processing and enrichment, to the actual operating of nuclear power plant and waste processing. Company name Country of origin Category Brief… …
127Shielded metal arc welding — (SMAW), also known as manual metal arc (MMA) welding, flux shielded arc welding …
128Near and far field — This article is about the electromagnetic concept. For the mathematical, see Near field (mathematics). Antenna field regions for antennas that are shorter than the wavelength of the radiation they emit, such as the whip antenna of a citizen s… …
