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发明名称
摘要
申请公布号
JPH072646(Y2)
申请公布日期
1995.01.25
申请号
JP19900058090U
申请日期
1990.05.31
申请人
发明人
分类号
E01C11/02;E01D19/06;(IPC1-7):E01C11/02
主分类号
E01C11/02
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