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发明名称
摘要
申请公布号
JPS5254171(U)
申请公布日期
1977.04.19
申请号
JP19750140682U
申请日期
1975.10.17
申请人
发明人
分类号
E02F3/88;B03B5/54;B63B35/00;E01H12/00;E02F9/06;(IPC1-7):B03B5/54;B63B35/02
主分类号
E02F3/88
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代理人
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地址
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