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发明名称
SAFETY VALVE
摘要
申请公布号
GB8610017(D0)
申请公布日期
1986.05.29
申请号
GB19860010017
申请日期
1986.04.24
申请人
CAMCO INC
发明人
分类号
E21B34/00;E21B34/10;(IPC1-7):F16K17/20
主分类号
E21B34/00
代理机构
代理人
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