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发明名称
SPRING AND METHOD
摘要
申请公布号
CA446716(A)
申请公布日期
1948.02.17
申请号
CAD446716
申请日期
申请人
THE AMERICAN ROLLING MILL COMPANY;RUSTLESS IRON AND STEEL CORPORATION
发明人
FREDERICK KENNETH BLOOM
分类号
主分类号
代理机构
代理人
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