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HEFTI. HESS. MARTIGNONI. (HHM) has been a leading Swiss provider of electrical and building engineering services for over 70 years. The company offers comprehensive services for construction and infrastructure projects, including HVAC, building automation, utility systems, photovoltaics, e-mobility, lighting, security, and fire protection. Using advanced IT tools and BIM methods, the team develops customized, efficient, and ecological solutions.
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