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发明名称
Improvements in and relating to hydraulic mine roof supports
摘要
申请公布号
GB1086532(A)
申请公布日期
1967.10.11
申请号
GB19640002315
申请日期
1964.01.18
申请人
W. E. & F. DOBSON LIMITED
发明人
TAYLOR LAURENCE WILLIAM;TOWN FRANK
分类号
E21D15/44;E21D23/00
主分类号
E21D15/44
代理机构
代理人
主权项
地址
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