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发明名称
摘要
申请公布号
JPS4914721(U)
申请公布日期
1974.02.07
申请号
JP19720053697U
申请日期
1972.05.10
申请人
发明人
分类号
E04F15/02;E04F15/00;(IPC1-7):E04F15/02
主分类号
E04F15/02
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