Question: In which city is the main U. S. office of this multinational diversified industrial company that merged Schroff GmbH located?

Context articles: Actuant
Carl Zeiss AG
Schroff GmbH
Italthai Industrial Group
Ingersoll Rand
Roper Technologies
Pentair
Myles Lee
Wabash National
TVS Group

Actuant Corporation is an American diversified industrial company serving customers from operations in more than 30 countries.
 The Actuant businesses are leaders in a broad array of niche markets including branded hydraulic tools and solutions; specialized products and services for energy markets and highly engineered position and motion control systems.
 The Company was founded in 1910 and is headquartered in Menomonee Falls, Wisconsin.
 Actuant business operations are divided into three segments focused on the markets they serve.
Carl Zeiss (] ), branded as ZEISS, is a German manufacturer of optical systems, industrial measurements and medical devices, founded in Jena, Germany in 1846 by optician Carl Zeiss.
 Together with Ernst Abbe (joined 1866) and Otto Schott (joined 1884) they built a base for modern optics and manufacturing.
 There are currently two parts of the company, Carl Zeiss AG located in Oberkochen with important subsidiaries in Aalen, Göttingen and Munich, and Carl Zeiss GmbH located in Jena.
Schroff GmbH is a German manufacturer of electronic packaging products.
 Schroff products include cabinets, housings, chassis and related components for multiple markets such as telecommunications, data centers and traffic management.
 Schroff GmbH is headquartered in Straubenhardt near Pforzheim, and was founded in 1962 by Gunther Schroff.
 It is now part of the UK-based company Pentair.
 Pentair employs 30,000 people worldwide of which about 1,500 are part of the Schroff Group.
Italthai Industrial Company Limited (commonly known as ITALTHAI) is a company of the ITALTHAI Group.
 The group is a conglomerate with more than 5,000 employees in six countries.
 Italthai Industrial Company Limited is one of the major distributors and providers of after-sales service for construction and industrial equipment in Thailand and neighboring countries.
 The company has over than 10 branches in Thailand as well as a newly opened Vientiane office.
Ingersoll-Rand plc () is a global diversified industrial company formed in 1905 by the merger of Ingersoll-Sergeant Drill Company and Rand Drill Company, rival companies that had each been founded in 1871.
 The company is incorporated in Dublin, Ireland, but has its headquarters in Davidson, North Carolina.
 Ingersoll-Rand has been a constituent of the S&P 500 Index since 2010, replacing Pactiv Corporation on 16 November 2010 (it had previously been in the S&P 500 Index until it was replaced by Quanta Services in June 2009).
Roper Technologies, Inc. (formerly Roper Industries, Inc.) is an American diversified industrial company that produces engineered products for global niche markets.
 The company is headquartered in Sarasota, Florida.
Pentair plc (PNR) is a multinational diversified industrial company incorporated in Ireland with tax residency in UK, with its main U.S. office located in Minneapolis, Minnesota.
 Pentair was founded in the US, where roughly half of the company's revenue is derived as of 2015.
 However, PNR was reorganized in 2014, shifting the corporate domicile from Switzerland to Ireland.
Myles Peter Lee (born 1953) is an Irish businessman.
 He was the chief executive (CEO) of CRH plc, an Irish multinational diversified building materials company, until his retirement on 1 January 2014, when he was succeeded by Albert Manifold.
 CRH is Ireland's largest company; its primary listing is on the London Stock Exchange and is a constituent of the FTSE 100 Index.
Wabash National is an American diversified industrial manufacturing company and North America’s leading producer of semi trailers and liquid transportation systems.
 The company specializes in the design and production of dry freight vans, refrigerated vans, platform trailers, liquid tank trailers, intermodal equipment, engineered products and composite products.
 Its products are sold under the following brand names: Wabash National, Transcraft, Benson, DuraPlate, Walker Transport, Walker Defense Group, Walker Barrier Systems, Walker Engineered Products, Brenner Tank, Beall, Garsite, Progress Tank, TST, Bulk Tank International and Extract Technology.
 The company operates a number of Wabash National Trailer Centers, trailer service centers and retail distributors of new and used trailers and aftermarket parts throughout the U.S.
 The 2015 revenue was 2.03 billion USD.
 2015 was the fourth consecutive year of record revenue and profitability and the sixth consecutive year of revenue and income growth.
TVS Group is an Indian diversified industrial conglomerate with its principal headquarters located in Madurai and presence across the Globe.
 Almost all holdings of the group are private.
 The largest and most visible subsidiary is TVS Motor Company, the third-largest two-wheeler manufacturers in India.
 TVS Group, with group revenue of more than US$6 billion, is an automotive conglomerate company, specialized in manufacturing of two-wheeler, three-wheeler, auto-electricals components, high tensile fasteners, die casting products,dealership business, brakes, wheels, tyres, axles, seating systems, fuel injection components, electronic and electrical components and many more.