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经营范围
发明名称
DRILLING HEAD
摘要
申请公布号
PL111192(B2)
申请公布日期
1980.08.30
申请号
PL19780207058
申请日期
1978.05.24
申请人
发明人
分类号
B23B;B23B51/06;(IPC1-7):B23B51/06
主分类号
B23B
代理机构
代理人
主权项
地址
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