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发明名称
Apparatus for automatically threading transverse ribs on to tubes, especially for heat exchangers
摘要
申请公布号
US3095639(A)
申请公布日期
1963.07.02
申请号
US19600062228
申请日期
1960.10.12
申请人
GEA LUFTKUHLERGESELLSCHAFT HAPPEL GESELLSCHAFT M. B. H. & CO. K. G.
发明人
SEIEN GUNTER
分类号
B21D53/08
主分类号
B21D53/08
代理机构
代理人
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