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发明名称
Production of flat punchings
摘要
申请公布号
US1915989(A)
申请公布日期
1933.06.27
申请号
US19300466045
申请日期
1930.07.07
申请人
GENERAL ELECTRIC COMPANY
发明人
GRANFIELD JOHN C.
分类号
C21D9/46
主分类号
C21D9/46
代理机构
代理人
主权项
地址
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