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经营范围
发明名称
Weak base rock floor digging bit
摘要
申请公布号
KR200436335(Y1)
申请公布日期
2007.08.01
申请号
KR20070006937U
申请日期
2007.04.26
申请人
发明人
分类号
E21B10/00;E02F9/28
主分类号
E21B10/00
代理机构
代理人
主权项
地址
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