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发明名称
An improved method for forming bearings on or through sheet material
摘要
申请公布号
GB762884(A)
申请公布日期
1956.12.05
申请号
GB19530036124
申请日期
1953.12.30
申请人
SAMUEL JACK MYERS
发明人
分类号
B21D53/40
主分类号
B21D53/40
代理机构
代理人
主权项
地址
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