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经营范围
发明名称
DUMP VALVE
摘要
申请公布号
GB2117871(B)
申请公布日期
1985.07.17
申请号
GB19820025144
申请日期
1982.08.31
申请人
* SCHOOLHILL HYDRAULIC ENGINEERING COMPANY
发明人
RONALD NORRIS * WHYTE
分类号
E21B33/035;F16K17/18;(IPC1-7):F16K17/18
主分类号
E21B33/035
代理机构
代理人
主权项
地址
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