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发明名称
HEAD FOR GAS DETECTORS
摘要
申请公布号
CA298005(A)
申请公布日期
1930.03.04
申请号
CAD298005
申请日期
申请人
THE DOMINION OXYGEN COMPANY
发明人
JOHN K. MABBS
分类号
主分类号
代理机构
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