شركات مصنعة، تجار، موردون، مزودو خدمات

Blumberg engineers (Ingenieurbüro Blumberg) is an international consultancy firm providing services like planning and design, tendering and construction supervision for ecotechnologies (constructed wetlands, reed bed sludge treatment, natural stormwater treatment systems, green wetlands, floating islands, natural swimming pools and wetland restoration).