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发明名称
Improvements in headers
摘要
申请公布号
GB901141(A)
申请公布日期
1962.07.18
申请号
GB19580000991
申请日期
1958.01.10
申请人
HEAD, WRIGHTSON & COMPANY LIMITED
发明人
BARNETT SAMUEL RICHARD
分类号
B21D53/02;F22B37/10
主分类号
B21D53/02
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