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发明名称
METHOD OF PIERCING & MANUFACTURING SEAMLESS TUBES
摘要
申请公布号
GB8807208(D0)
申请公布日期
1988.04.27
申请号
GB19880007208
申请日期
1988.03.25
申请人
SUMITOMO METAL INDUSTRIES LTD
发明人
分类号
B21B19/04
主分类号
B21B19/04
代理机构
代理人
主权项
地址
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