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经营范围
发明名称
Underground support in mining operations
摘要
申请公布号
ZA9810398(B)
申请公布日期
1999.05.24
申请号
ZA19980010398
申请日期
1998.11.13
申请人
BARNARD ADOLF JACOBUS
发明人
ADOLF JACOBUS BARNARD
分类号
E21D
主分类号
E21D
代理机构
代理人
主权项
地址
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