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发明名称
摘要
申请公布号
DE2160570(A1)
申请公布日期
1972.08.03
申请号
DE19712160570
申请日期
1971.12.07
申请人
发明人
分类号
E04B1/348;E04H7/20;E04H9/12
主分类号
E04B1/348
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代理人
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地址
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