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发明名称
BORE DRILLING APPARATUS
摘要
申请公布号
PL115808(B1)
申请公布日期
1981.05.30
申请号
PL19780209590
申请日期
1978.09.14
申请人
发明人
分类号
B23B;B23B41/14;(IPC1-7):B23B41/14
主分类号
B23B
代理机构
代理人
主权项
地址
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