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发明名称
Hohlziegelstein fuer Deckenbalken
摘要
申请公布号
DE841342(C)
申请公布日期
1952.06.16
申请号
DE1942A000695D
申请日期
1942.12.11
申请人
AHRENS THEODOR
发明人
AHRENS THEODOR
分类号
E04C3/22
主分类号
E04C3/22
代理机构
代理人
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