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公开(公告)号：US1771601A
公开(公告)日：1930-07-29
申请号：US20736527
申请日：1927-07-21
Applicant: HOWARD D COLMAN
Inventor： GOTFRIED ANDERSON
IPC: E05F15/12
CPC classification number: E05F15/616 , E05Y2900/132
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