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
