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发明名称
摘要
申请公布号
JPS487291(Y1)
申请公布日期
1973.02.24
申请号
JP19690025519U
申请日期
1969.03.22
申请人
发明人
分类号
B22C13/08;B22C15/24;(IPC1-7):B22C13/08;B22C15/22
主分类号
B22C13/08
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代理人
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