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发明名称
Hohlkoerper fuer Eisenbetonrippendecken, sog. Rohrzelle, Rahmenzelle o. dgl.
摘要
申请公布号
DE521061(C)
申请公布日期
1931.03.16
申请号
DENDATP059267D
申请日期
申请人
HANS POHLMANN
发明人
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主分类号
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