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发明名称
Method of producing spines on elements
摘要
申请公布号
US2220050(A)
申请公布日期
1940.10.29
申请号
US19380220214
申请日期
1938.07.20
申请人
THERMEK CORPORATION
发明人
HOESEL ANTHONY F.
分类号
B21C37/20
主分类号
B21C37/20
代理机构
代理人
主权项
地址
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