Municipal Public Works Construction General Contracting Level IIElectrical and mechanical engineering construction general contracting IIGrade II general contracting of petrochemical engineering constructionWater conservancy and hydropower project construction general contracting level 3Grade III general contracting of highway engineering constructionPower engineering construction general contracting level 3Building decoration and decoration engineering professional contracting levelProfessional contracting of waterproof, anticorrosion and thermal insulation engineering
Class II general contracting of construction worksMunicipal Public Works Construction General Contracting Level IIWater conservancy and hydropower project construction general contracting level IIGrade II general contracting of highway engineering constructionElectrical and mechanical engineering construction general contracting IIGrade II General Contracting for Power Engineering ConstructionBuilding decoration and decoration engineering professional contracting levelProfessional contracting of foundation engineering
Class II general contracting of construction worksMunicipal Public Works Construction General Contracting Level IIWater conservancy and hydropower project construction general contracting level IIGrade II general contracting of highway engineering constructionElectrical and mechanical engineering construction general contracting IITransportation enterprise safety production standardization level 1Building decoration engineering professional contracting secondarySteel structure engineering professional contracting secondary
Class II general contracting of construction worksMunicipal Public Works Construction General Contracting Level IIWater conservancy and hydropower project construction general contracting level IIGrade II general contracting of highway engineering constructionElectrical and mechanical engineering construction general contracting IIGrade II General Contracting for Power Engineering ConstructionBuilding decoration engineering professional contracting secondaryBuilding curtain wall engineering professional contracting secondary
Class II general contracting of construction worksMunicipal Public Works Construction General Contracting Level IIWater conservancy and hydropower project construction general contracting level IIGrade II general contracting of highway engineering constructionBuilding decoration and decoration engineering professional contracting levelTransportation enterprise safety production standardization level 1Building curtain wall engineering professional contracting secondarySteel structure engineering professional contracting secondary
Class II general contracting of construction worksMunicipal Public Works Construction General Contracting Level IIWater conservancy and hydropower project construction general contracting level IIGrade II general contracting of highway engineering constructionTransportation enterprise safety production standardization level 1Agricultural wastewater, Grade ASurface runoff, Grade AWater ecosystem protection, Class A
Ecological Restoration Grade BMunicipal public works construction general contracting level IWater pollution treatment, Class AGrade BHighway traffic engineering highway safety facilities professional contracting secondaryEngineering Design Building Curtain Wall Engineering Special Class BEngineering Design Building Intelligent System Special Class BClass I General Contracting of Construction Engineering
Ecological Restoration Grade BProfessional contracting of foundation engineeringNoise and Vibration Class BSolid waste treatment and disposal Class BTransportation enterprise safety production standardization level 1Water Pollution Treatment Class BUrban and road lighting engineering professional contracting secondaryMunicipal Public Works Construction General Contracting Level II
Agricultural wastewater, Grade ATransportation enterprise safety production standardization level 1Water Pollution Treatment Class BWastewater from centralized pollution control facilities, Class ADomestic sewage, Grade AEcological Restoration Grade BWater ecosystem protection, Class ANoise and Vibration Class B
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