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经营范围
发明名称
An apparatus for cracking the base rock
摘要
申请公布号
KR100549648(B1)
申请公布日期
2006.02.13
申请号
KR20030017391
申请日期
2003.03.20
申请人
发明人
分类号
E21C25/00
主分类号
E21C25/00
代理机构
代理人
主权项
地址
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