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  2. Tunnel boring machine - Wikipedia

    en.wikipedia.org/wiki/Tunnel_boring_machine

    Tunnel boring machine. A tunnel boring machine ( TBM ), also known as a "mole", is a machine used to excavate tunnels. Tunnels are excavated through hard rock, wet or dry soil, or sand, each of which requires specialized technology. Tunnel boring machines are an alternative to drilling and blasting (D&B) methods and "hand mining".

  3. Rube Goldberg machine - Wikipedia

    en.wikipedia.org/wiki/Rube_Goldberg_machine

    A Rube Goldberg machine, named after American cartoonist Rube Goldberg, is a chain reaction –type machine or contraption intentionally designed to perform a simple task in an indirect and (impractically) overly complicated way. Usually, these machines consist of a series of simple unrelated devices; the action of each triggers the initiation ...

  4. Heckler & Koch GMG - Wikipedia

    en.wikipedia.org/wiki/Heckler_&_Koch_GMG

    Heckler & Koch GMG. A GMG of the German Army. 28.8 kg Gun, 10.7 kg tripod and 8 kg softmount. The GMG ( Granatmaschinengewehr or "grenade machine gun") is an automatic grenade launcher developed by Heckler & Koch for the German Army. It is also often referred to as GMW or GraMaWa ( Granatmaschinenwaffe ).

  5. M60 machine gun - Wikipedia

    en.wikipedia.org/wiki/M60_machine_gun

    The M60, officially the Machine Gun, Caliber 7.62 mm, M60, is a family of American general-purpose machine guns firing 7.62×51mm NATO cartridges from a disintegrating belt of M13 links. There are several types of ammunition approved for use in the M60, including ball , tracer , and armor-piercing rounds.

  6. M3 submachine gun - Wikipedia

    en.wikipedia.org/wiki/M3_submachine_gun

    Fixed rear peep sight and blade foresight, calibrated to 100 yards for caliber .45 M1911 ball ammunition [12] The M3 is an American .45-caliber submachine gun adopted by the U.S. Army on 12 December 1942, as the United States Submachine Gun, Cal. .45, M3. [12] The M3 was chambered for the same .45 ACP round fired by the Thompson submachine gun ...

  7. Punching machine - Wikipedia

    en.wikipedia.org/wiki/Punching_Machine

    Punching machine. A punching machine is a machine tool for punching and embossing flat sheet-materials to produce form-features needed as mechanical element and/or to extend static stability of a sheet section. According to the file, Richard Walsh, the county of Grayson, and the State of Texas had invented and applied for US patent in 1894.

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