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发明名称
摘要
申请公布号
JPS624589(Y2)
申请公布日期
1987.02.02
申请号
JP19810162695U
申请日期
1981.11.02
申请人
发明人
分类号
E02B11/00;E02D29/02;F16L19/00;(IPC1-7):E02D29/02
主分类号
E02B11/00
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