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发明名称
摘要
申请公布号
JPH01174423(U)
申请公布日期
1989.12.12
申请号
JP19880067643U
申请日期
1988.05.23
申请人
发明人
分类号
E02B7/20;E02B7/32;(IPC1-7):E02B7/32
主分类号
E02B7/20
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