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发明名称
INSTALLATION DEVICES
摘要
申请公布号
GB8520447(D0)
申请公布日期
1985.09.18
申请号
GB19850020447
申请日期
1985.08.15
申请人
HUNT ENGINEERS LTD, WILLIAM
发明人
分类号
E21B17/10;E21B33/136;E21B37/02;G09F15/00
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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