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    Design Qualification:

    Engineering certificate for environmental project grade 1 and municipal drainage project grade 2、project consulting certificate grade 2

    Construction Qualification:

    Contracting certificate of environmental protection project grade 1

    General contracting certificate of municipal construction grade 2

    General contracting certificate of mechanical & electrical engineering grade 1

    Contracting certificate of mechanical & electrical equipment installation for construction grade 2

    General contracting certificate of water conservancy and hydropower project grade 3

    O&M Qualification:

    Sewage treatment grade 1

    Industrial wastewater treatment grade 1

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