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发明名称
Method of making steel-rule type piercing and blanking dies
摘要
申请公布号
US3152492(A)
申请公布日期
1964.10.13
申请号
US19620164133
申请日期
1962.01.03
申请人
WHITECOTTON GRAYDON E
发明人
WHITECOTTON GRAYDON E.
分类号
B21D37/20
主分类号
B21D37/20
代理机构
代理人
主权项
地址
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