亚洲AV综合AV一区加勒比-加勒比人妻AV无码不卡-亚洲日韩精品无码专区加勒比

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  • 010-8205 5667 CN
    Handan new rural reconstruction project
    2020.09.18 Solution 647

    In the new rural transformation of Yongnian County, Handan, the negative pressure conveyance and resource utilization system of black ash moisture is adopted to separate the high-load feces and urine from the source for collection and treatment. The concept is changed and the treatment process is simplified, which not only recycles the resources, but also solves the problems of difficult mixed sewage treatment and supervision.

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    亚洲AV综合AV一区加勒比-加勒比人妻AV无码不卡-亚洲日韩精品无码专区加勒比