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经营范围
发明名称
BOHRMASCHINE
摘要
申请公布号
DE2713338(A1)
申请公布日期
1977.10.06
申请号
DE19772713338
申请日期
1977.03.25
申请人
JOY MANUFACTURING CO.
发明人
D. MORRISON,WARD
分类号
E21B19/08;B25D9/12;E21B6/00;E21B44/06;(IPC1-7):E21B7/00
主分类号
E21B19/08
代理机构
代理人
主权项
地址
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