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发明名称
WELDING NOZZLE GUIDE ARM FOR SPIRAL PIPE MACHINES
摘要
申请公布号
CA514524(A)
申请公布日期
1955.07.12
申请号
CAD514524
申请日期
申请人
ARMCO STEEL CORPORATION
发明人
DALE WILLEY;RALPH E. ASBURY
分类号
主分类号
代理机构
代理人
主权项
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