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          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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