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发明名称
Perfectionnements aux etançons métalliques
摘要
申请公布号
BE472707(A)
申请公布日期
1947.05.31
申请号
BED472707
申请日期
1947.04.21
申请人
SCHULTE FERDINAND
发明人
分类号
E21D15/28;E21D15/42
主分类号
E21D15/28
代理机构
代理人
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