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发明名称
摘要
申请公布号
SU486855(A1)
申请公布日期
1975.10.05
申请号
SU19731920483
申请日期
1973.05.04
申请人
发明人
分类号
B22D13/00;(IPC1-7):B22D13/00
主分类号
B22D13/00
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代理人
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地址
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