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发明名称
Pipe-bending device
摘要
申请公布号
US1742489(A)
申请公布日期
1930.01.07
申请号
US19280320410
申请日期
1928.11.19
申请人
JOHN SUNDGREN
发明人
SUNDGREN JOHN
分类号
B21D7/06
主分类号
B21D7/06
代理机构
代理人
主权项
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