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发明名称
Deckenhohlstein mit mehreren Hohlraeumen und einschlagbaren Bruecken
摘要
申请公布号
DE505444(C)
申请公布日期
1930.08.18
申请号
DE1927M101782D
申请日期
1927.10.22
申请人
DIPL.-ING. KARL MUELLER
发明人
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主分类号
代理机构
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