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发明名称
HELICAL LOCK SEAM PIPE
摘要
申请公布号
CA385840(A)
申请公布日期
1939.12.26
申请号
CAD385840
申请日期
申请人
THE AMERICAN ROLLING MILL COMPANY
发明人
JONATHAN ROY FREEZE
分类号
主分类号
代理机构
代理人
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