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发明名称
摘要
申请公布号
JPS57193721(U)
申请公布日期
1982.12.08
申请号
JP19810079198U
申请日期
1981.05.31
申请人
发明人
分类号
E02B7/40;E02B7/42;(IPC1-7):E02B7/42
主分类号
E02B7/40
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