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公开(公告)号:US2707798A
公开(公告)日:1955-05-10
申请号:US23873251
申请日:1951-07-26
IPC分类号: E05F3/10
CPC分类号: E05F3/108 , E05Y2900/132 , Y10T16/2782 , Y10T16/5381 , Y10T16/53864 , Y10T16/55963 , Y10T16/55988 , Y10T16/625
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公开(公告)号:US2770003A
公开(公告)日:1956-11-13
申请号:US23873151
申请日:1951-07-26
IPC分类号: E05F3/10
CPC分类号: E05F3/108 , E05Y2900/132 , Y10T16/2766 , Y10T16/2782 , Y10T16/281
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