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发明名称
PIPE WELDING APPARATUS
摘要
申请公布号
CA330559(A)
申请公布日期
1933.02.28
申请号
CAD330559
申请日期
申请人
THE NATIONAL TUBE COMPANY
发明人
THOMAS W. C. BEATTIE
分类号
主分类号
代理机构
代理人
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