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公开(公告)号：US1244910A
公开(公告)日：1917-10-30
申请号：US16108817
申请日：1917-04-10
Applicant: SMITH DUNCAN W
Inventor： SMITH DUNCAN W
CPC classification number: E05B63/244 , E05F11/54 , E05Y2201/676 , E05Y2800/00 , E05Y2900/132 , Y10T292/19 , Y10T292/696
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