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发明名称
Advancing hydraulic mine roof support frame assembly
摘要
申请公布号
GB1049471(A)
申请公布日期
1966.11.30
申请号
GB19640006317
申请日期
1964.02.14
申请人
GEWERKSCHAFT EISENHUTTE WESTFALIA
发明人
分类号
E21D23/00
主分类号
E21D23/00
代理机构
代理人
主权项
地址
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