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发明名称
Method of making tubing
摘要
申请公布号
US1890077(A)
申请公布日期
1932.12.06
申请号
US19280288698
申请日期
1928.06.27
申请人
ELTING AUGUST O
发明人
ELTING AUGUST O.
分类号
B21D15/02
主分类号
B21D15/02
代理机构
代理人
主权项
地址
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