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发明名称
摘要
申请公布号
JPS57161662(U)
申请公布日期
1982.10.12
申请号
JP19810048679U
申请日期
1981.04.03
申请人
发明人
分类号
E04G21/24;E04G21/32;(IPC1-7):E04G21/32
主分类号
E04G21/24
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