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发明名称
Billet marker
摘要
申请公布号
US2641995(A)
申请公布日期
1953.06.16
申请号
US19500171116
申请日期
1950.06.29
申请人
UNITED STATES STEEL CORPORATION
发明人
WHITTAKER JAMES E.
分类号
B44B5/00
主分类号
B44B5/00
代理机构
代理人
主权项
地址
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