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发明名称
Tubing expander
摘要
申请公布号
GB2068805(A)
申请公布日期
1981.08.19
申请号
GB19810003236
申请日期
1981.02.03
申请人
DRESSER INDUSTRIES INC
发明人
分类号
B21D39/12;(IPC1-7):B21D39/12
主分类号
B21D39/12
代理机构
代理人
主权项
地址
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