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公开(公告)号：US2754784A
公开(公告)日：1956-07-17
申请号：US27108852
申请日：1952-02-12
Applicant: BRITISH INSULATED CALLENDERS
IPC: B21C37/08
CPC classification number: B21C37/08 , Y10T29/49117 , Y10T29/49885
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2.发明授权Manufacture of metal tubes applicable in some cases as electric conductors or other parts of electric cables 失效在某些情况下，金属管的制造可用作电导体或电缆的其他部分
公开(公告)号：US2749866A
公开(公告)日：1956-06-12
申请号：US21880651
申请日：1951-04-02
Applicant: BRITISH INSULATED CALLENDERS
Inventor： JOHNSON DIXON HENRY , HARRY WEBSTER GEORGE
IPC: B21C37/087
CPC classification number: B21C37/087
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