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发明名称
摘要
申请公布号
JPS48916(Y1)
申请公布日期
1973.01.11
申请号
JP19690073596U
申请日期
1969.08.01
申请人
发明人
分类号
E01C11/22;E01F5/00;E02B5/02;E02B9/02;E02B13/00;(IPC1-7):E02B9/02
主分类号
E01C11/22
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代理人
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