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发明名称
Mine prop with rapid yield facility
摘要
申请公布号
ZA9601864(B)
申请公布日期
1996.09.12
申请号
ZA19960001864
申请日期
1996.03.07
申请人
HL & H TIMBER PRODUCTS (PROPRIETARY) LIMITED
发明人
RICHARD GEORGE KING
分类号
E21D
主分类号
E21D
代理机构
代理人
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地址
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