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2. Jeffrey Manufacturing Company - Wikipedia

   en.wikipedia.org/wiki/Jeffrey_Manufacturing_Company

   The company was an early adopter of electric motors, and one of the first American manufacturers to build a mining locomotive powered from an overhead wire, in 1888. [7] This was followed by a line of electrically-driven coal mining machines. [8] By 1911, the company's plant in Columbus occupied more than 30 acres.

3. Vermeer Corporation - Wikipedia

   en.wikipedia.org/wiki/Vermeer_Corporation

   At his request, a local machine shop fabricated a number of these hoists to meet the demand. Today, Vermeer holds several product and design patents within its line of utility and track trenchers, directional boring systems, tub grinders, tree equipment, excavation machines, and hay-harvesting products.

4. Worthington Enterprises - Wikipedia

   en.wikipedia.org/wiki/Worthington_Enterprises

   Worthington Enterprises, Inc. is a global diversified metals manufacturing company based in Columbus, Ohio.It is a steel processor and manufacturer of pressure vessels, such as propane, oxygen and helium tanks, hand torches, refrigerant and industrial cylinders, camping cylinders, exploration, recovery and production products for global energy markets; water system tanks for storage, treatment ...

5. Boring (manufacturing) - Wikipedia

   en.wikipedia.org/wiki/Boring_(manufacturing)

   A part's-eye view of a boring bar. Hole types: Blind hole (left), through hole (middle), interrupted hole (right). In machining, boring is the process of enlarging a hole that has already been drilled (or cast) by means of a single-point cutting tool (or of a boring head containing several such tools), such as in boring a gun barrel or an engine cylinder.

6. List of companies in Greater Cincinnati - Wikipedia

   en.wikipedia.org/wiki/List_of_companies_in...

   GE Aerospace, aircraft engine manufacturer;a subsidiary of the General Electric conglomerate (in Evendale, Ohio); employs 7,400 [2] GE Honda Aero Engines, engine designer and manufacturer for business aviation; 50% owned by GE, 50% owned by Honda; Milacron (NYSE: MZ), a plastics machinery producer, formerly Cincinnati Milling Machine Company

7. Herrenknecht - Wikipedia

   en.wikipedia.org/wiki/Herrenknecht

   Herrenknecht AG is a German company that manufactures tunnel boring machines (TBMs). Headquartered in Allmannsweier, Schwanau, Baden-Württemberg, it is the worldwide market leader for heavy TBMs. Established by Martin Herrenknecht in 1975, the company soon grew.