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发明名称
Metal junction piece and the production thereof
摘要
申请公布号
US2986273(A)
申请公布日期
1961.05.30
申请号
US19540412844
申请日期
1954.02.26
申请人
THE UNITED STEEL COMPANIES LIMITED;THE CHESTERFIELD TUBE COMPANY LIMITED
发明人
BARDGETT WILLIAM E.
分类号
B21C23/22
主分类号
B21C23/22
代理机构
代理人
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