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qualification and certificate
• grade 1 contractor in electrical & mechanical installation engineering
• grade 1 contractor in electronic and intelligent engineering
• grade 2 contractor in fire facilities engineering
• grade 2 contractor in building decoration and decoration engineering
• grade 2 contractor in waterproof anti-corrosion insulation engineering
• grade 3 general contractor in construction engineering
• class-b special certification of architectural  intelligent system design
• grade 3 general contractor in petrochemical construction engineering
• grade 3 general contractor in municipal public engineering
• grade 3 general contractor in electrical and mechanical engineering
• grade 3 contractor in steel structure engineering
• grade 3 contractor in city and road lighting engineering
• grade 3 contractor in environmental engineering
• special grade b for architectural decoration engineering
• pressure pipe
• safety production license
• medical instrument business license
• bank of china aaa credit rating certificate


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