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经营范围
发明名称
CONTROL OF MINE ROOF SUPPORT ASSEMBLIES
摘要
申请公布号
CA888477(A)
申请公布日期
1971.12.21
申请号
CAD888477
申请日期
申请人
A. G. WILD AND CO. LIMITED
发明人
LEWIS R. BOWER
分类号
主分类号
代理机构
代理人
主权项
地址
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