- Hightech Guide Dortmund
- Offers data on the provider of comprehensive overview of the companies, institutes and research establishments in future-oriented sectors. Includes portrait, biomedicine, micro and nanotechnology, production technology, services and contacts.
- Martindale.com: Dortmund
- Lists law firms practicing in the city.
- Seal System AG
- Provides location and contact information on the local offices of the imaging company.
- Siegfried Krüger Motoren- und Ersatzteilvertriebsgesellschaft mbH
- Contains information on the supplier of engines and spare-parts for manufacturers of trucks, passenger cars and construction equipment. Includes profile, products, partners, news and contacts.
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