- ΗΟΜΕ
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- NATIONAL NATURAL GAS SYSTEM
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- List of Supplementary Transmission Services
- Additional LNG Services
- Οther Non Regulatory Services
- Polyethylene Welding Certification
- Gas Metrology Services
- Operation and Maintenance of Natural Gas Distribution Network
- Natural Gas Odorization Services
- Administrative, Technical & Meteorological user support in measuring stations
- Vehicle Gas Refueling Stations (CNG)
- Technical Consulting Services
- Corrosion and Lightning Protection
- Natural Gas Transmission System Technical Support
- Non Destructive Testing (NDT) Services
- Provision of Operational Data
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