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发明名称
摘要
申请公布号
JPS4851916(A)
申请公布日期
1973.07.21
申请号
JP19720107254
申请日期
1972.10.27
申请人
发明人
分类号
E01B3/28;B28B7/08;B28B7/24;B28B13/02;B28B23/04;B28B23/06;(IPC1-7):E01B/
主分类号
E01B3/28
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