two-pole system
31Trolley pole — For the weapon, see Trolley pole (weapon). . [cite web| url=http://ocw.mit.edu/OcwWeb/Civil and Environmental Engineering/1 012Spring2002/Readings/detail/green line project.htm| title=Boston Transit Milestones| author=Dr. Romin Koebel| work=MIT… …
32Axis system — In music the axis system, proposed by Ernő Lendvai (1971, p.1 16) in his analysis of the use of tonality in the music of Béla Bartók, is an assignment of harmonic function to all twelve pitch classes in relation to an assigned tonic, determined… …
33Horizontal coordinate system — The horizontal coordinate system is a celestial coordinate system that uses the observer s local horizon as the fundamental plane. This conveniently divides the sky into the upper hemisphere that you can see, and the lower hemisphere that you… …
34Dick Pole — Pitcher Born: October 13, 1950 (1950 10 13) (age 61) Trout Creek, Michigan Batted: Right Threw: Right  …
35Leigh Brackett Solar System — The Leigh Brackett Solar System is a fictional analogue to the real world Solar System in which a majority of the planetary romances of Leigh Brackett take place.Although Brackett s stories do not form a series with a consistent chronology and… …
36Magnetic pole strength — (symbol: p) is a physical quantity used to measure the strength of the pole of a bar magnet (or a hypothetical magnetic monopole). If there is an infinitely long wire where the electric current is I, then the magnetic pole strength is defined as… …
37Geographic coordinate system — Map of Earth showing lines of latitude (horizontally) and longitude (vertically), Eckert VI projection; large version (pdf, 3.12MB) …
38Railway electrification system — Railway electrification supplies electrical energy to railway locomotives and multiple units so they can operate without having a reciprocating engine of their own.CharacteristicsThe main advantage of electric traction is a higher power to weight …
39Maidenhead Locator System — The Maidenhead Locator System is a geographic coordinate system used by amateur radio operators. Dr. John Morris, G4ANB, originally devised the system, and a group of VHF managers, meeting in Maidenhead, England in 1980, adopted it. The… …
40Utility pole — A utility pole, telegraph pole, telephone pole, power (electricity) pole, or telegraph post is a pole used to support overhead electrical wires, cables, and optical fiber and associated equipment. They may carry both wires to distribute electric… …
