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发明名称
Hydraulically operated self-advancing mine roof supports
摘要
申请公布号
GB1031861(A)
申请公布日期
1966.06.02
申请号
GB19630043420
申请日期
1963.11.04
申请人
ELECTRO-HYDRAULICS LIMITED
发明人
EDWARDS STANLEY ALFRED
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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