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摘要
申请公布号
PL82152(B1)
申请公布日期
1975.10.31
申请号
PL19720154995
申请日期
1972.04.26
申请人
发明人
分类号
B22C9/03;B29C33/38;B29C49/00;B29C51/00;(IPC1-7):B22C9/00;B22C21/00
主分类号
B22C9/03
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