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经营范围
发明名称
Improvements in or relating to mine roof and like supports
摘要
申请公布号
GB998336(A)
申请公布日期
1965.07.14
申请号
GB19620046026
申请日期
1962.12.05
申请人
GULLICK LIMITED
发明人
WALSH DONALD THOMAS
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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