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发明名称
摘要
申请公布号
JPS5620396(B2)
申请公布日期
1981.05.13
申请号
JP19760043818
申请日期
1976.04.19
申请人
发明人
分类号
B02C7/12;D21D1/30
主分类号
B02C7/12
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代理人
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