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发明名称
Composite billet and manufacture thereof
摘要
申请公布号
US2421891(A)
申请公布日期
1947.06.10
申请号
US19430479588
申请日期
1943.03.18
申请人
SUPERIOR STEEL CORPORATION
发明人
KEENE WALTER L.;CARLSON WILLIAM A.
分类号
B23K20/04
主分类号
B23K20/04
代理机构
代理人
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