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发明名称
摘要
申请公布号
JPH0715849(Y2)
申请公布日期
1995.04.12
申请号
JP19890065950U
申请日期
1989.06.06
申请人
发明人
分类号
C02F1/40;E01C23/12;(IPC1-7):E01C23/12
主分类号
C02F1/40
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