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发明名称
摘要
申请公布号
BE742955(A)
申请公布日期
1970.06.11
申请号
BED742955
申请日期
1969.12.11
申请人
发明人
分类号
E04B2/68;E04C2/04;E04C2/38
主分类号
E04B2/68
代理机构
代理人
主权项
地址
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