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发明名称
摘要
申请公布号
JPS5536208(U)
申请公布日期
1980.03.08
申请号
JP19780116258U
申请日期
1978.08.25
申请人
发明人
分类号
E21D21/00;E21D20/00;(IPC1-7):E21D21/00
主分类号
E21D21/00
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代理人
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