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公开(公告)号：US2741793A
公开(公告)日：1956-04-17
申请号：US33402853
申请日：1953-01-29
Applicant: ALCOMETALLER AB
Inventor： NORELIUS JOHN D
IPC: E05F3/10
CPC classification number: E05F3/106 , E05Y2201/656 , E05Y2900/132 , Y10T16/2766 , Y10T16/2799
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