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发明名称
摘要
申请公布号
JPS5710242(B2)
申请公布日期
1982.02.25
申请号
JP19770049690
申请日期
1977.04.28
申请人
发明人
分类号
E01C11/26;E01B19/00
主分类号
E01C11/26
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