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发明名称
摘要
申请公布号
JPS57184126(U)
申请公布日期
1982.11.22
申请号
JP19810068777U
申请日期
1981.05.13
申请人
发明人
分类号
E02B7/20;(IPC1-7):E02B7/20
主分类号
E02B7/20
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代理人
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