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发明名称
LOCK & RELEASE DEVICE
摘要
申请公布号
GB8516295(D0)
申请公布日期
1985.07.31
申请号
GB19850016295
申请日期
1985.06.27
申请人
NORTHERN ENG INDUSTRIES PLC
发明人
分类号
E21B17/043;F16D1/02
主分类号
E21B17/043
代理机构
代理人
主权项
地址
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