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经营范围
发明名称
FRICTION WELDING THIN WALL TUBES
摘要
申请公布号
GB1272961(A)
申请公布日期
1972.05.03
申请号
GB19690028081
申请日期
1969.06.03
申请人
CATERPILLAR TRACTOR CO.
发明人
分类号
B23K20/12
主分类号
B23K20/12
代理机构
代理人
主权项
地址
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