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发明名称
摘要
申请公布号
DE2057096(A1)
申请公布日期
1972.07.06
申请号
DE19702057096
申请日期
1970.11.20
申请人
发明人
分类号
E04B2/02;E04C1/40
主分类号
E04B2/02
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代理人
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地址
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