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经营范围
发明名称
Preperforated tubing
摘要
申请公布号
GB2316024(A)
申请公布日期
1998.02.18
申请号
GB19970023198
申请日期
1995.06.23
申请人
* QUALITY TUBING INC
发明人
JOHN R * MARTIN
分类号
B21C37/15;B21C37/28;E21B17/20;E21B43/08;E21B43/10;E21B43/11;(IPC1-7):E03B3/20;B21C37/02
主分类号
B21C37/15
代理机构
代理人
主权项
地址
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