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发明名称
Pipe bending apparatus
摘要
申请公布号
US2697469(A)
申请公布日期
1954.12.21
申请号
US19520315651
申请日期
1952.10.20
申请人
BECROFT JAMES O
发明人
BECROFT JAMES O.
分类号
B21D7/022
主分类号
B21D7/022
代理机构
代理人
主权项
地址
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