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发明名称
Apparatus for absorbing the secondary rays in x-ray photography
摘要
申请公布号
GB512277(A)
申请公布日期
1939.08.31
申请号
GB19380017006
申请日期
1938.06.08
申请人
PAUL KAMM
发明人
分类号
G21K1/02
主分类号
G21K1/02
代理机构
代理人
主权项
地址
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