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کنترل کیفیت

  • چین Changsha Tongchuang Mechanical Co., Ltd. certifications
    China Construction Machinery Industry Association membership certificate
    چین Changsha Tongchuang Mechanical Co., Ltd. certifications
    Utility Model Patent Certificate for a Concrete Mixer Transport Vehicle Converted from an Oil-Powered to an Electric-Powered One
    چین Changsha Tongchuang Mechanical Co., Ltd. certifications
    A Device of Concrete Pump Truck Converted from Oil-Powered to Electric-Powered
    چین Changsha Tongchuang Mechanical Co., Ltd. certifications
    A Reinforced Concrete Pipeline with a Base
    چین Changsha Tongchuang Mechanical Co., Ltd. certifications
    A High-wear-resistant Double-layer Straight Pipe for Concrete Conveying
    چین Changsha Tongchuang Mechanical Co., Ltd. certifications
    A high-wear-resistant double-layer straight pipe with strengthened and reinforced ends
    چین Changsha Tongchuang Mechanical Co., Ltd. certifications
    A composite wear-resistant concrete conveying elbow
    چین Changsha Tongchuang Mechanical Co., Ltd. certifications
    AuditReport
    چین Changsha Tongchuang Mechanical Co., Ltd. certifications
    Enterprise credit rating certificate AAA level
    چین Changsha Tongchuang Mechanical Co., Ltd. certifications
    Certificate of good faith demonstration unit AAA level
    چین Changsha Tongchuang Mechanical Co., Ltd. certifications
    Service and trustworthiness certificate AAA level
    چین Changsha Tongchuang Mechanical Co., Ltd. certifications
    Enterprise credit rating certificate AAA level
  • چین Changsha Tongchuang Mechanical Co., Ltd. certifications
    Quality service integrity enterprise certificate AAA level
    چین Changsha Tongchuang Mechanical Co., Ltd. certifications
    Enterprise certificate of honoring contract and keeping promise AAA level
    چین Changsha Tongchuang Mechanical Co., Ltd. certifications
    Quality and credit certificate AAA level
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