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2. Swivel (drill rig) - Wikipedia

   en.wikipedia.org/wiki/Swivel_(drill_rig)

   A Swivel is a mechanical device used on a drilling rig that hangs directly under the traveling block and directly above the kelly drive, that provides the ability for the kelly (and subsequently the drill string) to rotate while allowing the traveling block to remain in a stationary rotational position (yet allow vertical movement up and down the derrick) while simultaneously allowing the ...

3. List of components of oil drilling rigs - Wikipedia

   en.wikipedia.org/wiki/List_of_components_of_oil...

   Drill bit (#26) is a device attached to the end of the drill string that breaks apart the rock being drilled. It contains jets through which the drilling fluid exits. Drill floor (#21) is the area on the rig where the tools are located to make the connections of the drill pipe, bottom hole assembly, tools and bit. It is considered the main area ...

4. Lincoln Electric - Wikipedia

   en.wikipedia.org/wiki/Lincoln_Electric

   The company was founded in 1895 by John C. Lincoln with an investment of $200 to make electric motors he had designed. [3]The company is headquartered in Euclid, Ohio, and has 44 manufacturing locations, including operations and joint ventures in 19 countries and an international network of distributors and sales offices covering more than 160 countries.

5. Combination gun - Wikipedia

   en.wikipedia.org/wiki/Combination_gun

   The earliest combination guns were called swivel guns, (not to be confused with the more widely known small cannon that is mounted on a swiveling stand or fork and allows a wide range of motion) which used a set of barrels designed to rotate to allow either the rifled or the smoothbore barrel to line up with a flintlock mechanism before firing. [2]

6. Rock Drill (Jacob Epstein) - Wikipedia

   en.wikipedia.org/wiki/Rock_Drill_(Jacob_Epstein)

   Study for Rock Drill (c. 1913) is a 67.5 cm (26.6 in) × 42.5 cm (16.7 in) charcoal drawing by Epstein which is part of The Garman Ryan Collection at The New Art Gallery Walsall. [7] Whilst the exact date of the sketch is unknown, because it is a preparatory study for Epstein's full sculpture Rock Drill , it has been dated to 1913.

7. M30 Luftwaffe Drilling - Wikipedia

   en.wikipedia.org/wiki/M30_Luftwaffe_Drilling

   The M30 Luftwaffe Drilling ("triple") was a survival weapon issued to Luftwaffe pilots during World War II.It was used by airmen operating in Northern Africa.The M30 was intended to be used for hunting and self-defense against a variety of natural predators.