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发明名称
MINE ROOF TESTING
摘要
申请公布号
CA447567(A)
申请公布日期
1948.03.30
申请号
CAD447567
申请日期
申请人
GENERAL REINSURANCE CORPORATION
发明人
ROBERT T. GALLAGHER;ROBERT D. CURRIE;CORNELIUS B. GRENNECKE
分类号
主分类号
代理机构
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