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发明名称
Electrical engraving machines
摘要
申请公布号
US2854560(A)
申请公布日期
1958.09.30
申请号
US19560612690
申请日期
1956.09.28
申请人
WILLIAM HILL JOHN
发明人
HILL JOHN WILLIAM
分类号
B23H7/28;B23K7/00;B23K9/00;B23Q1/54;B23Q1/62
主分类号
B23H7/28
代理机构
代理人
主权项
地址
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