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经营范围
发明名称
MINE SUPPORT ELEMENT
摘要
申请公布号
ZA9005261(B)
申请公布日期
1991.05.29
申请号
ZA19900005261
申请日期
1990.07.05
申请人
ESTATE LATE DIRK CORNELIUS STEPHANUS VENTER
发明人
DIRK CORNELIUS STEPHANUS VENTER
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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