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    2. China Construction Metal Structure Association Member unit
      Certificate of handle patent for design
      Certificate of latch patent for utility model
      Certificate of latch patent for utility model
      Certificate of one kind of handle for design
      Certificate of wo-way crescent lock patent for utility model
      Certificate of handle(Asian)atent for design
      Certificate of crescent lock patent for design
      Certificate of one kind of handle for design
      Certificate of one kind of handle for design
      Certificate of crescent lock patent for design
      Certificate of handle patent for design
      Certificate of wo-way crescent lock for design
      Certificate of side-hinged door lock handle (015) patent for design
      Certificate of handle patent for design
      Certificate of handle patent for design
      Certificate of transmission handle patent for design
      “China Construction Metal Structure” Periodical Office Director unit
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