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发明名称
Improvements in devices for expanding tubes
摘要
申请公布号
GB410709(A)
申请公布日期
1934.05.24
申请号
GB19330035982
申请日期
1933.12.21
申请人
GEORGES ERNEST WAGNER
发明人
分类号
B21D39/12
主分类号
B21D39/12
代理机构
代理人
主权项
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