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发明名称
Process of making cores
摘要
申请公布号
US1864107(A)
申请公布日期
1932.06.21
申请号
US19310510057
申请日期
1931.01.20
申请人
WALTER WILLIAM H
发明人
WALTER WILLIAM H.
分类号
B22C1/26
主分类号
B22C1/26
代理机构
代理人
主权项
地址
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