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发明名称
摘要
申请公布号
JPS5734529(Y2)
申请公布日期
1982.07.30
申请号
JP19780000987U
申请日期
1978.01.11
申请人
发明人
分类号
G09B19/14;E01F13/00;E01F13/04;(IPC1-7):G09B19/14
主分类号
G09B19/14
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