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发明名称
COMPRESSIBLE MINE SUPPORT
摘要
申请公布号
ZA8308627(B)
申请公布日期
1984.07.25
申请号
ZA19830008627
申请日期
1983.11.18
申请人
FERREIRA IGNATIUS LEOPOLD
发明人
FERREIRA IGNATIUS LEOPOLD
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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