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发明名称
Improvements in or relating to hydraulic mine roof supports
摘要
申请公布号
GB1087391(A)
申请公布日期
1967.10.18
申请号
GB19640000720
申请日期
1964.01.07
申请人
A. G. WILD & CO. LIMITED
发明人
BOWER LEWIS ROBERT
分类号
E21D17/01;E21D23/06
主分类号
E21D17/01
代理机构
代理人
主权项
地址
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