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发明名称
摘要
申请公布号
JP2619115(B2)
申请公布日期
1997.06.11
申请号
JP19900141800
申请日期
1990.05.31
申请人
发明人
分类号
E02F9/20;E02F3/43;(IPC1-7):E02F3/43
主分类号
E02F9/20
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