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发明名称
Insbesondere hydraulisch abgestuetzter Ausbaurahmen oder Grubenstempel
摘要
申请公布号
DE1458678(A1)
申请公布日期
1969.09.18
申请号
DE19671458678
申请日期
1967.07.27
申请人
FLETCHER AND STEWART LTD.
发明人
DEREK ELSE,JOHN;WILLIAM GRANT,JOHN
分类号
E21D15/54
主分类号
E21D15/54
代理机构
代理人
主权项
地址
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