Question: What is the nationality of the group of electrical engineering companies which created the DB Class 202?

Context paragraphs:
DB Class V 162: The DB Class V 162 (after 1968 named DB Class 217) is a class of four-axle diesel hydraulic locomotive built as a development of the DB Class V 160 for the Deutsche Bundesbahn from 1965 to 1968.

Xiaodong Wang (electrical engineer): Xiaodong Wang () is an information theorist and professor of Electrical Engineering at Columbia University.  He earned a BS degree in electrical engineering and applied mathematics from Shanghai Jiaotong University, an MS degree in electrical and computer engineering from Purdue University, and a PhD from Princeton University in electrical engineering.  He formerly served as assistant professor of Electrical Engineering at Texas A&M University before he joined Columbia as an assistant professor in January 2002.

FSE Engineering Group: FSE Engineering Group Ltd (FSEE) (Chinese: 豐盛創建機電 工程有限公司)is the Electrical Engineering & Mechanical Engineering business company.  It was established in 1997 when its predecessor, NWS Engineering Group Ltd, sold out to Fung Seng Enterprises, It become a part of enterprise.  Now, FSE Engineering Group Ltd (FSEE) is the largest E&M Building Services engineering companies in Hong Kong

Forensic electrical engineering: Forensic electrical engineering is a branch of forensic engineering, and is concerned with investigating electrical failures and accidents in a legal context.  Many forensic electrical engineering investigations apply to fires suspected to be caused by electrical failures.  Forensic electrical engineers are most commonly retained by insurance companies or attorneys representing insurance companies, or by manufacturers or contractors defending themselves against subrogation by insurance companies.  Other areas of investigation include accident investigation involving electrocution, and intellectual property disputes such as patent actions.  Additionally, since electrical fires are most often cited as the cause for "suspect" fires an electrical engineer is often employed to evaluate the electrical equipment and systems to determine whether the cause of the fire was electrical in nature.

Brown, Boveri &amp; Cie: Brown, Boveri (BBC) was a Swiss group of electrical engineering companies.

DB Class 218: The DB Class 218 (before 1968 the DB Class V 164) are a class of 4 axle, diesel hydraulic locomotives acquired by the Deutsche Bundesbahn for use on main and secondary lines for both passenger and freight trains.

DB Class V 169: The DB Class V 169 consisted of a single example: V 169 001, derived from the DB Class V 160 family, with an additional gas turbine booster engine.  It can be considered the prototype for diesel locomotives with a gas turbine as an additional drive; specifically the DB Class 210.  Post 1968 the class designation was changed to "Class 219", and the locomotive renumbered 219 001

DB Class V 51 and V 52: The DB Class V 51 (from 1968: DB Class 251) and DB Class V 52 (from 1968: DB Class 252) are classes of almost identical narrow gauge 4 axle diesel hydraulic locomotives built in 1964 for the Deutsche Bundesbahn, being built for and gauge lines respectively.

Henschel-BBC DE2500: The DB Class 202, also commonly referred to under its manufacturers' designation Henschel-BBC DE2500, since it was only in experimental use and never purchased by the DB, is a class of diesel-electric locomotives designed for use on main and secondary lines for both passenger and freight trains.

The Electrician: The Electrician, published in London from 1861 to 1952, was the earliest and foremost electrical engineering periodical and scientific journal.  Originally established in 1861, it was discontinued after about three years until 1878 when it was revived and hence published weekly.  The initial volumes of "The Electrician" published in the early 1860s advertised themselves as being "a weekly journal of Telegraphy, Electricity, and Applied Chemistry" and were published by Thomas Piper.  After being relaunched in the late 1870s, the periodical changed focus and publishers, being published by James Gray on behalf of the proprietors and advertising itself as "a weekly illustrated journal of electrical engineering, industry and science" and also featured more theoretical aspects of electrical engineering such as electromagnetism.  This method of publication also allowed for other types of publications and sometime in the late nineteenth century, The Electrician Printing and Publication Company Limited was established and began publishing shorter electrical engineering texts including well-known early electrical engineering titles such as Oliver Heaviside's "Electromagnetic theory" (1893-1912), Oliver Lodge's "The work of Hertz and some of his successors" (1894), and many others.  Some of these publications were based on papers presented elsewhere and published in full in "the Electrician".  After its second reincarnation, "The Electrician" quickly established itself in the field of electrical engineering and was regularly quoted and cited in "Nature" and elsewhere.

Supporting paragraphs: Henschel-BBC DE2500 Brown, Boveri &amp; Cie
Answer: Swiss