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发明名称
摘要
申请公布号
JPS6231457(Y2)
申请公布日期
1987.08.12
申请号
JP19810153774U
申请日期
1981.10.15
申请人
发明人
分类号
E02B11/02;A01B13/08;(IPC1-7):E02B11/02
主分类号
E02B11/02
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代理人
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