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发明名称
HYDRAULISK VENTILAKTIVERINGSINNRETNING FOR UNDERVANNS SIKKERHETSVENTIL.
摘要
申请公布号
NO873115(A)
申请公布日期
1988.07.13
申请号
NO19870003115
申请日期
1987.07.24
申请人
CAMCO INC
发明人
PRINGLE RONALD EARL
分类号
E21B34/00;E21B34/10;(IPC1-7):E21B34/10
主分类号
E21B34/00
代理机构
代理人
主权项
地址
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