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发明名称
摘要
申请公布号
JPS6419681(U)
申请公布日期
1989.01.31
申请号
JP19870110770U
申请日期
1987.07.20
申请人
发明人
分类号
C02F1/46;E03D9/08;(IPC1-7):E03D9/08
主分类号
C02F1/46
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代理人
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