all-welded structure
41Timeline of Russian inventions and technology records — The Hall of Space Technology in the Tsiolkovsky State Museum of the History of Cosmonautics, Kaluga, Russia. The exhibition includes the models and replicas of the following Russian inventions: the first satellite, Sputnik 1 (a ball under the… …
42Messerschmitt Bf 109 variants — Main article: Messerschmitt Bf 109 Bf 109 Bf 109G 10, with Erla Haube canopy and taller, wooden vertical fin/rudd …
43Sutton Hoo — restored). Although based on helmets of the spangenhelm type, the immediate comparisons are with contemporary Vendel Age helmets from eastern Sweden.] Sutton Hoo near Woodbridge, Suffolk, England, is the site of two Anglo Saxon cemeteries of the… …
44Bladesmith — Bladesmithing is the art of blacksmithing that relates specifically to creating knives, swords, daggers and other blades using a forge, hammer, anvil, and other smithing tools. Bladesmiths employ a variety of metalworking techniques used by… …
45harbours and sea works — Introduction harbour also spelled harbor any part of a body of water and the manmade structures surrounding it that sufficiently shelters a vessel from wind, waves, and currents, enabling safe anchorage or the discharge and loading of… …
46nuclear reactor — Physics. reactor (def. 4). Also called nuclear pile. [1940 45] * * * Device that can initiate and control a self sustaining series of nuclear fission reactions. Neutrons released in one fission reaction may strike other heavy nuclei, causing them …
47List of Russian people — The Millennium of Russia monument in Veliky Novgorod, featuring the statues and reliefs of the most celebrated people in the first 1000 years of Russian history …
48Bicycle frame — Steel frame of 2000 LeMond Zurich road racing bicycle mounted in a work stand …
49World Trade Center — For other uses, see World Trade Center (disambiguation). World Trade Center[1] …
50Window shutter hardware — Window Shutter Hardware> Overview A series of documents are provided here to further explain terms and terminology related to shutter hardware and blacksmithing, as well as the evolution of early hardware.A Brief History of Early Hardware In its… …
