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发明名称
Method of fabricating a t
摘要
申请公布号
US2425645(A)
申请公布日期
1947.08.12
申请号
US19440536113
申请日期
1944.05.18
申请人
TRI-CLOVER MACHINE COMPANY
发明人
RYAN ROBERT
分类号
B21C37/29
主分类号
B21C37/29
代理机构
代理人
主权项
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