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发明名称
摘要
申请公布号
JPS63161941(U)
申请公布日期
1988.10.21
申请号
JP19870014009U
申请日期
1987.02.02
申请人
发明人
分类号
E02D17/20;(IPC1-7):E02D17/20
主分类号
E02D17/20
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代理人
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