ceiling tube
51HMS Dreadnought (1906) — For other ships of the same name, see HMS Dreadnought. Dreadnought at sea; note the torpedo net booms folded against her side Class overview Name …
52Miniature UAV — An EMT Aladin of the German Army A miniature UAV or Small UAV (SUAV),[1] is an unmanned aerial vehicle small enough to be man portable. Miniature UAVs range from micro air vehicles (MAVs) that can be carried by an infantryman, to man portable… …
53North American Rockwell OV-10 Bronco — OV 10 Bronco A U.S. Air Force OV 10 firing a white phosphorus smoke rocket to mark a ground target Role …
54tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …
55Metal-halide lamp — A metal halide gas discharge lighting system provides illumination for a college baseball game at Olsen Field in College Station, Texas, United States. Note the various colors of the lights as they warm up. Metal halide lamps, a member of the… …
56Neon lighting — Times Square, New York City, has been famous for elaborate neon lighting displays since th …
57Architecture of the night — De Volharding Building, The Hague, 1928 by Jan Buijs, photographed in 1930 …
58Heinkel He 100 — refimprove|date=January 2008infobox Aircraft name = He 100 type = Fighter manufacturer = Heinkel caption = Rare wartime image used for propaganda purposes designer = Walter Günter, Siegfried Günter first flight = 22 January 1938 introduced =… …
59Bechtel — Infobox Company company name = Bechtel Corporation company company type = Private company slogan = Bechtel Builds foundation = 1898 industry = Heavy construction, Engineering, Project Management location = San Francisco key people = Riley P.… …
60Ted Williams Tunnel — Infobox Bridge bridge name=Ted Williams Tunnel caption= official name= carries= crosses=Boston Harbor locale=South Boston, Massachusetts to Logan International Airport maint= id= design= mainspan=3,960 feet (1,207 m) length=8,448 feet (2,575 m)… …
