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发明名称
METHOD AND APPARATUS FOR SPARK MACHINING
摘要
申请公布号
CA576246(A)
申请公布日期
1959.05.19
申请号
CAD576246
申请日期
申请人
FIRTH STERLING INC.
发明人
CECIL P. PORTERFIELD
分类号
主分类号
代理机构
代理人
主权项
地址
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