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发明名称
Valve system and method
摘要
申请公布号
AU2002331034(B2)
申请公布日期
2007.02.15
申请号
AU20020331034
申请日期
2002.08.09
申请人
WORLDWIDE OILFIELD MACHINE, INC.
发明人
ALAGARSAMY SUNDARARAJAN
分类号
E21B34/04;E21B33/06;E21B33/064;E21B34/02
主分类号
E21B34/04
代理机构
代理人
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地址
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