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In page Schunk Group:

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The companies Weiss Umwelttechnik GmbH and Weiss Klimatechnik GmbH operate under the trademark of the Weiss Technik. Karl Weiss GmbH was founded in 1956 as a manufacturer of electrophysical equipment. In 1978 it was taken over by the Schunk Group. The Weiss Technik consists of the two business units, Environmental Simulation and Air Solutions. In the course of several decades the company consortium expanded both nationally and internationally. The Weiss Technik has a total of over 22 companies in 14 countries worldwide and employs about 2,000 people (with 850 in the main plant at Reiskirchen-Lindenstruth in Hesse).[citation needed]