| Bratim SA Brasov Construction plants. Metal structures, profiles and fittings. Construction installation-assembly. Construction installations. | | Bravcof SA Brasov Industrial and civil construction. Sale of building materials. Construction and assembly. .... | |
| C.P.G. SRL Baia Mare Electric wiring and networks. Electrical networks - installation and setup for constructions. | | Calin Service Total SRL Calarasi Design and installation of methane pipelines. Construction, installation, servicing, repairing of thermal power plant. | |
| Calor Grup SRL Resita Tools and equipment. Air conditioning and heating devices. Industrial and civil construction. Design and installation of methane pipelines. .... | | Cambeea SRL Bacau Alarm Systems. Telephony. Video cameras. Intercoms. Antennas. Electrical installations. | |
| Cimoret SA Craiova Industrial and civil construction. Industrial buildings, design of store-houses and warehouses. Construction and assembly. Tools and equipme.... | | CIS Gaz SA Mures Exploitation of natural gas. Construction installations. Construction and assembly. | |
| Clima Design SRL Cluj-Napoca Air conditioning devices: mobile, split, column, duct, tape, floor fan, air curtains dehum.... | | Climatherm SRL Piatra Neamt Gas and water piping for construction. Construction, installation, servicing, repairing of thermal power plant. Air conditioning and heating.... | |
| Colt SA Oltenita Construction and assembly. Industrial and civil construction. | | Comenerg SRL Satu Mare Milling. Electrical networks - installation and setup for constructions. Construction installation-assembly. Cereal supplier. | |
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