STOCKHOLM--(BUSINESS WIRE)--Regulatory News: Nederman Holding AB (STO:NMAN) has doubled its business to become the global market leader in industrial air filtration. This has been achieved by Nederman acquiring Dantherm Filtration - one of the leading manufacturers of industrial air filtration equipment. Dantherm Filtration (excluding the business not taken over in France) had sales in 2009 of around SEK 980 million, a headcount of slightly over 900 and is a business area of the listed
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