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发明名称
摘要
申请公布号
JPH074554(B2)
申请公布日期
1995.01.25
申请号
JP19900307812
申请日期
1990.11.13
申请人
发明人
分类号
B02C17/04;B02C17/00;B02C17/20;(IPC1-7):B02C17/20
主分类号
B02C17/04
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