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发明名称
MINE ROOF SUPPORT SYSTEMS
摘要
申请公布号
CA562023(A)
申请公布日期
1958.08.19
申请号
CAD562023
申请日期
申请人
DOWTY MINING EQUIPMENT LIMITED
发明人
MICHAEL C. POTTS
分类号
主分类号
代理机构
代理人
主权项
地址
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