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发明名称
摘要
申请公布号
GB1238661(A)
申请公布日期
1971.07.07
申请号
GBD1238661
申请日期
1968.08.29
申请人
发明人
分类号
B22D15/02;B22D18/02
主分类号
B22D15/02
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代理人
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地址
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