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发明名称
摘要
申请公布号
USRE28422(E)
申请公布日期
1975.05.20
申请号
US19730389230
申请日期
1973.08.17
申请人
发明人
分类号
B22C5/08;B28C7/04;G01N27/04
主分类号
B22C5/08
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