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发明名称
Gratings
摘要
申请公布号
US3046852(A)
申请公布日期
1962.07.31
申请号
US19580746392
申请日期
1958.07.03
申请人
CAPITOL PRODUCTS CORPORATION
发明人
GRAHAM DONALD CONWAY
分类号
E04C2/42
主分类号
E04C2/42
代理机构
代理人
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