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O que (quem) é 300B - definição
300B
DIRECTLY-HEATED AUDIO FREQUENCY POWER TRIODE
In electronics, the 300B is a directly-heated power triode vacuum tube with a four-pin base, introduced in 1938 by Western Electric to amplify telephone signals. It measures 6.
Popoli di Tessaglia!
RECITATIVE ARIA COMPOSED BY WOLFGANG AMADEUS MOZART WITH LYRICS BY RANIERI DE' CALZABIGI
K. 316; K. 300b
"" (K. 316/300b) is a recitative and aria for soprano and orchestra that Wolfgang Amadeus Mozart wrote for Aloysia Weber.
Boeing 747
![[[Air Force One]], a [[Boeing VC-25]], over [[Mount Rushmore]]](https://commons.wikimedia.org/wiki/Special:FilePath/Air Force One over Mt. Rushmore.jpg?width=200 "[[Air Force One]], a [[Boeing VC-25]], over [[Mount Rushmore]]")
![flaps]]](https://commons.wikimedia.org/wiki/Special:FilePath/Air New Zealand Boeing 747-400 (ZK-SUH) arrives London Heathrow 17Oct2010 arp.jpg?width=200 "flaps]]")
.jpg?width=200 "American Airlines 747 Wurlitzer electronic piano, 1971")
![[[Shuttle Carrier Aircraft]] carrying a [[Space Shuttle orbiter]]](https://commons.wikimedia.org/wiki/Special:FilePath/Atlantis on Shuttle Carrier Aircraft.jpg?width=200 "[[Shuttle Carrier Aircraft]] carrying a [[Space Shuttle orbiter]]")
 Dreamlifter - PAE (19833251496).jpg?width=200 "747-400}}, first flew on September 9, 2006")
.jpg?width=200 "The prototype 747 was first displayed to the public on September 30, 1968.")
![JAL]]](https://commons.wikimedia.org/wiki/Special:FilePath/JA8170 B747-146SR SUD JAL Japan Airlines HND 23MAY03 (8473400794).jpg?width=200 "JAL]]")
![747-8]]](https://commons.wikimedia.org/wiki/Special:FilePath/Lufthansa Boeing 747-8 (16093562187).jpg?width=200 "747-8]]")
![Launch Customer [[Northwest Airlines]] introduced the 747-400 in 1989.](https://commons.wikimedia.org/wiki/Special:FilePath/Northwest Airlines Boeing 747-400 Spijkers.jpg?width=200 "Launch Customer [[Northwest Airlines]] introduced the 747-400 in 1989.")
![The original 747-100 has a short upper deck with three windows per side; [[Pan Am]] introduced it on January 22, 1970](https://commons.wikimedia.org/wiki/Special:FilePath/Pan Am Boeing 747-121 N732PA Bidini.jpg?width=200 "The original 747-100 has a short upper deck with three windows per side; [[Pan Am]] introduced it on January 22, 1970")
![First Lady [[Pat Nixon]] christened the first commercial 747 on January 15, 1970.](https://commons.wikimedia.org/wiki/Special:FilePath/Pat Nixon christens Boeing 747 2749-18.jpg?width=200 "First Lady [[Pat Nixon]] christened the first commercial 747 on January 15, 1970.")
![747-400}}, featuring canted [[winglet]]s, entered service in February 1989 with [[Northwest Airlines]]](https://commons.wikimedia.org/wiki/Special:FilePath/The Boeing 747 (3441131089).jpg?width=200 "747-400}}, featuring canted [[winglet]]s, entered service in February 1989 with [[Northwest Airlines]]")
AIRLINER FAMILY BY BOEING
Boeing 747-121; Boeing 747-237B; Boeing 747-283B; Boeing 747-209B; Boeing 747-100SR; Boeing 747-100SR-46; Boeing 747SR-46; Boeing 747-300; Boeing 747-237; Boeing 747-100; Boeing 747-130; Boeing 747-200; Boeing 747 B-18210; 747adv; Boeing 747X; B747; 747-200; Boeing C-19; Boeing 747-2B5F; Boeing 747-3B5; Boeing 747-4B5; 747-300; Megatop; Boeing 747-430; Boeing 7474; Boeing 747-SR46; B-747; B 747; Boieng 74; Boeing 742; B74F; Boeing 747-500X; Boeing 747-600X; Boeing 747-700X; Boeing B747; Boeing B-747 200B; Boeing B-747 200F; Boeing 747SR; Boeing 747-200B; Boeing 747-206B; Boeing 747-121A; Boeing 747-131; 747-SR46; Boeing 747-200C; Boeing 747-200F; 747-500X; 747-600X; 747-700X; Boeing 747-300B; 747-300B; B747-100B; 747-100B; Boeing 747-100B; B747-300B; 747-100; 747-200F; 74M; Boeing747; 747X; Boeing-747; Boeing Model 747; Boeing 747-146SR; B742; Boeing 747SR-81; Boeing 747-2R7F; Boeing 747-409; Boeing 747-249F; Boeing 747-246B; Queen of the Skies; Boing 747; Boeing 747-200M; Boeing 747 Classic; Boeing 747-258F; Boeing 747-168B; Boeing 747-244B; Boeing 747-258F/SCD; Boeing 747-230B; Boeing 747-428BCF; Boeing 747-230; Boeing 747-48EF; Boeing 747-136; Boeing 747-200BM; Boeing 747-236B; Boeing 747SP-21; Boeing 747-121SF; Boeing 747-438; Boeing 747-368; Boeing 747-357; Boeing 747–44AF (SCD); Boeing 747-244B Combi; Boeing 747-44AF (SCD); Boeing 747-122; Jack Waddell; The Boeing 747; Jumbo jet(747); Boeing 743; Boeing 747-209BSF; B747-8F; B747-400F; Jumbo plane; Boeing 747-100F; 747 (plane); 747 airplane; 747 plane; 747 (aircraft); Boeing B747-8; Boeing B-747; Hump plane; 747 boeing; 747SR
The Boeing 747 is a large, long-range wide-body airliner designed and manufactured by Boeing Commercial Airplanes in the United States.
Exemplos do corpo de texto para 300B
1. Compare that to the Iraq war ($300B+) and the DoD annual budget ($420B+), the NASA budget is a bargain for the benefits gained. – S.