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发明名称
摘要
申请公布号
JPS5219512(Y2)
申请公布日期
1977.05.04
申请号
JP19720090782U
申请日期
1972.08.03
申请人
发明人
分类号
G09F13/16;E01F13/00;E01F13/02;E01F13/04;(IPC1-7):E01F9/02
主分类号
G09F13/16
代理机构
代理人
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