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发明名称
Grating
摘要
申请公布号
US2246216(A)
申请公布日期
1941.06.17
申请号
US19380229895
申请日期
1938.09.14
申请人
RELIANCE STEEL PRODUCTS COMPANY
发明人
NAGIN HARRY S.
分类号
E04C2/42
主分类号
E04C2/42
代理机构
代理人
主权项
地址
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