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2. Fuel cell - Wikipedia

   en.wikipedia.org/wiki/Fuel_cell

   [66] [67] Steam power plants usually achieve efficiencies of 30-40% [68] while combined cycle gas turbine and steam plants can achieve efficiencies above 60%. [ 69 ] [ 70 ] In combined heat and power (CHP) systems, the waste heat produced by the primary power cycle - whether fuel cell, nuclear fission or combustion - is captured and put to use ...

3. List of unmade Doctor Who serials and films - Wikipedia

   en.wikipedia.org/wiki/List_of_unmade_Doctor_Who...

   The series' first serial, The Giants, was to be written by C. E. Webber.In the first episode, "Nothing at the End of the Lane", [2] the four main characters (then the Doctor, Cliff, Lola, and Biddy) are shrunk to a miniature size and attacked by giant animals.

4. 16-inch/50-caliber Mark 7 gun - Wikipedia

   en.wikipedia.org/wiki/16-inch/50-caliber_Mark_7_gun

   The 16-inch/50 caliber Mark 7 guns of the forward turret of the battleship USS Wisconsin (BB-64) fire at enemy targets ashore on the Korean Peninsula on 30 January 1952 during the Korean War. Employees working with the automatic 16-inch powder stacking machine at Naval Ammunition Depot Hingham, Mass. during World War II.

5. Big Inch - Wikipedia

   en.wikipedia.org/wiki/Big_Inch

   The Inch pipelines comprised two systems, the Big Inch pipeline and the Little Big Inch pipeline. [22] The Big Inch was a 24-inch (610 mm) pipeline for crude oil; it ran from the East Texas Oil Field at Longview, Texas, to Norris City, Illinois, and on to Phoenixville, Pennsylvania, from where it branched into 20-inch-diameter (510 mm) segments ...

6. 3-inch ordnance rifle - Wikipedia

   en.wikipedia.org/wiki/3-inch_ordnance_rifle

   The 3-inch rifle was not as effective in firing canister shot as the heavier 12-pounder Napoleon, but it proved to be highly accurate at longer ranges when firing common shell or spherical case shot. There was only one reported case of a 3-inch ordnance rifle bursting in action.

7. Armament of the Iowa-class battleship - Wikipedia

   en.wikipedia.org/wiki/Armament_of_the_Iowa-class...

   Designed as a long-range, all-weather, subsonic cruise missile, the Tomahawk was capable of reaching targets at a much greater range than the 16-inch (406 mm) guns on the Iowa-class ships. When added to the battleships in the 1980s the Tomahawk became the longest-ranged weapon carried by the battleships. [38]