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发明名称
Method and apparatus for the manufacture of disk ribbed pipes
摘要
申请公布号
US1975422(A)
申请公布日期
1934.10.02
申请号
US19320645848
申请日期
1932.12.05
申请人
JOSEF HELLENBROICH WILHELM
发明人
HELLENBROICH WILHELM JOSEF
分类号
B23P19/00
主分类号
B23P19/00
代理机构
代理人
主权项
地址
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