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发明名称
摘要
申请公布号
JPS5550139(U)
申请公布日期
1980.04.02
申请号
JP19780131702U
申请日期
1978.09.27
申请人
发明人
分类号
E01C19/28;(IPC1-7):E01C19/28
主分类号
E01C19/28
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