Engineering Design Oil & Gas (Offshore Oil) Industry Offshore Oil Specialty Class AOffshore Oil Engineering Professional Contracting Level IGrade II General Contracting for Power Engineering ConstructionEngineering Design Power Industry New Energy Power Generation Specialty Class BConstruction Safety Production PermitSafety Production Standardization of Transportation Enterprises Level IIOil and Gas Class BPressure Piping Design Industrial Piping Class GC1
Engineering Design Oil & Gas (Offshore Oil) Industry Class AEngineering Design Construction Industry (Construction) Class AEngineering Design Municipal Industry Town Gas Engineering Specialty Class AEngineering Design Chemical Petrochemical Pharmaceutical Industry Petroleum and Chemical Products Storage and Transportation Major Class AEngineering Design Oil & Gas (Offshore Oil) Industry Offshore Oil Specialty Class AEngineering design Special light steel structure project Class AEngineering Design Special Fire Protection Facilities Engineering Class AEngineering Design, Municipal Industry, Drainage Engineering, Grade B
Grade II general contracting of petrochemical engineering constructionSecond-Level Specialized Contracting for Building Mechanical and Electrical Installation ProjectsOffshore oil engineering professional contracting secondaryEngineering Design Construction Industry (Construction Engineering) Class BEngineering Design Power Industry Wind Power Generation Specialty Class BEngineering Design Power Industry New Energy Power Generation Specialty Class BEngineering Design Oil & Gas (Offshore Oil) Industry Offshore Oil Specialty Class AEngineering Design Oil and Gas (Offshore Oil) Industry Oil and Gas Depot Specialty Class B
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