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The Liebherr Group is a large German equipment manufacturer based in Switzerland specializing in cranes , aircraft parts , household appliances , and mining . It has a workforce of 35,333 and comprises more than 130 companies across all countries . By 2007 , it was the world ’ s largest crane company . Established in 1949 , the company began life in the construction sector by building affordable tower cranes . Today , the group has a large portfolio and also produces some of the world ’ s biggest mining and digging machinery , including loaders , excavators and extreme-size dump trucks .
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28 June 2015