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发明名称
Stein fuer Hohlsteindecken
摘要
申请公布号
DE699729(C)
申请公布日期
1940.12.05
申请号
DE193700G5764D
申请日期
1937.07.03
申请人
ENGELBERT GRAEWER
发明人
GRAEWER ENGELBERT
分类号
E04B9/00;E04B9/22
主分类号
E04B9/00
代理机构
代理人
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地址
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