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发明名称
Concrete radiation shielding means
摘要
申请公布号
US2726339(A)
申请公布日期
1955.12.06
申请号
US19490079522
申请日期
1949.03.03
申请人
BORST LYLE B
发明人
BORST LYLE B.
分类号
G21F1/04
主分类号
G21F1/04
代理机构
代理人
主权项
地址
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