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发明名称
Metal working and article produced thereby
摘要
申请公布号
US1945877(A)
申请公布日期
1934.02.06
申请号
US19290355856
申请日期
1929.04.17
申请人
BONTE FREDERICK R
发明人
BONTE FREDERICK R.
分类号
B21C1/00
主分类号
B21C1/00
代理机构
代理人
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