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发明名称
摘要
申请公布号
JPS521154(Y1)
申请公布日期
1977.01.12
申请号
JP19700129964U
申请日期
1970.12.22
申请人
发明人
分类号
E04G17/16;(IPC1-7):E04G17/16
主分类号
E04G17/16
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