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发明名称
摘要
申请公布号
JPS6260698(U)
申请公布日期
1987.04.15
申请号
JP19850148235U
申请日期
1985.09.30
申请人
发明人
分类号
E21D20/00;(IPC1-7):E21D20/00
主分类号
E21D20/00
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