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发明名称
摘要
申请公布号
JPS563475(Y2)
申请公布日期
1981.01.26
申请号
JP19740129967U
申请日期
1974.10.26
申请人
发明人
分类号
E01D19/10;E01F15/00;E01F15/04;E04F11/16;E04F11/18;(IPC1-7):E04F11/16
主分类号
E01D19/10
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代理人
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