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发明名称
DRAINAGE METHOD IN MANHOLE
摘要
申请公布号
JPH05272165(A)
申请公布日期
1993.10.19
申请号
JP19920068412
申请日期
1992.03.26
申请人
发明人
分类号
E02D29/12;E03F1/00;(IPC1-7):E03F1/00
主分类号
E02D29/12
代理机构
代理人
主权项
地址
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