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发明名称
Yielding timber mine support
摘要
申请公布号
ZA200509210(B)
申请公布日期
2009.04.29
申请号
ZA20050009210
申请日期
2005.11.15
申请人
TIESPRO 31 (PTY) LTD.
发明人
FRANS PIENAAR;MARK HOWELL;DIETER GROSS
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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