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发明名称
摘要
申请公布号
JPS5644228(B2)
申请公布日期
1981.10.17
申请号
JP19760144884
申请日期
1976.11.30
申请人
发明人
分类号
E04G21/12;E04C5/04;E04C5/18
主分类号
E04G21/12
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