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发明名称
Improvements in or relating to methods of welding rails
摘要
申请公布号
GB777177(A)
申请公布日期
1957.06.19
申请号
GB19550014365
申请日期
1955.05.18
申请人
PHILIPS ELECTRICAL INDUSTRIES LIMITED
发明人
分类号
B23K9/038
主分类号
B23K9/038
代理机构
代理人
主权项
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