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发明名称
摘要
申请公布号
JPS5912318(Y2)
申请公布日期
1984.04.13
申请号
JP19800146391U
申请日期
1980.10.16
申请人
发明人
分类号
E21D9/093;E21D9/06;E21D9/08;(IPC1-7):E21D9/06
主分类号
E21D9/093
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