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发明名称
摘要
申请公布号
JPS5640318(B2)
申请公布日期
1981.09.19
申请号
JP19770134625
申请日期
1977.11.11
申请人
发明人
分类号
E04F15/06;E04H7/00;E04H7/02;G21C13/00
主分类号
E04F15/06
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