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发明名称
摘要
申请公布号
JPH0111794(Y2)
申请公布日期
1989.04.06
申请号
JP19810091352U
申请日期
1981.06.19
申请人
发明人
分类号
E02B7/40;E02B7/54;(IPC1-7):E02B7/40
主分类号
E02B7/40
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代理人
主权项
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