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发明名称
摘要
申请公布号
JPS4810984(Y1)
申请公布日期
1973.03.24
申请号
JP19690099025U
申请日期
1969.10.20
申请人
发明人
分类号
E01C19/48;(IPC1-7):E01C19/48
主分类号
E01C19/48
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代理人
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