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发明名称
Method and tool for perforating ingots
摘要
申请公布号
GB863645(A)
申请公布日期
1961.03.22
申请号
GB19570020853
申请日期
1957.07.02
申请人
KARL BEISNER
发明人
分类号
B21J9/04
主分类号
B21J9/04
代理机构
代理人
主权项
地址
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