slope detector
51Mars Observer — Artist rendering of Mars Observer in orbit around Mars. Operator NASA / JPL …
52King's Cross fire — The King s Cross fire was a fatal underground fire in London which broke out at approximately 19:30 on 18 November 1987, and which killed 31 people.It took place at King s Cross St. Pancras, a major interchange on the London Underground. The… …
531956 Winter Olympics — VII Olympic Winter Games The emblem is a stylized snowflake with the Olympic rings and a star, the emblem of the Italian National Olympic Committee. Host city …
54Audio system measurements — are made for several purposes. Designers take measurements so that they can specify the performance of a piece of equipment. Maintenance engineers make them to ensure equipment is still working to specification, or to ensure that the cumulative… …
55Railway 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 …
56Explorer 35 — was a spin stabilized spacecraft instrumented for interplanetary studies, at lunar distances, of the interplanetary plasma, magnetic field, energetic particles, and solar X rays. It was launched into an elliptical lunar orbit. The spin axis… …
57H2S radar — The H2S radar was used in bombers of RAF Bomber Command. It was designed to identify targets on the ground for night and all weather bombing. The transmitter/receiver equipment was officially known as TR3159 (H2S Mk I/ASV VIB) or TR3191 (H2S Mk… …
58Go Down, Moses — infobox Book | name = Go Down, Moses title orig = translator = image caption = 1st edition cover author = William Faulkner cover artist = country = United States language = English genre = Novel publisher = Random House (US) release date = 1942… …
59Glossary of wildland fire terms — The following is a glossary of wildland fire terms. Except where noted, terms are taken from a 1998 Fireline Handbook transcribed for a Conflict 21 counter terrorism studies website by the Air National Guard. [… …
60Mariovo — (Macedonian Cyrillic: Мариово) is a region in the southern part of Macedonia (area of 1390 square km, elevation 1050 m), situated between the mountains Selechka (highest peak Visoka 1471 m) on the west, Nidze (highest peak Kajmakchalan 2520 m)… …
