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发明名称
Toit plein en pierres creuses
摘要
申请公布号
FR1004426(A)
申请公布日期
1952.03.31
申请号
FRD1004426
申请日期
1947.04.21
申请人
发明人
SCHNEIDER HANS MARIA
分类号
E04B7/20
主分类号
E04B7/20
代理机构
代理人
主权项
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