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经营范围
发明名称
A Hydraulic Roof Support for Mines.
摘要
申请公布号
GB1153490(A)
申请公布日期
1969.05.29
申请号
GB19660038850
申请日期
1966.08.31
申请人
HANS-JOACHIM VON HIPPEL
发明人
HANS-JOACHIM VON HIPPEL
分类号
E21D17/082;E21D23/00;E21F13/08
主分类号
E21D17/082
代理机构
代理人
主权项
地址
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