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经营范围
发明名称
Gate valve
摘要
申请公布号
US4944488(A)
申请公布日期
1990.07.31
申请号
US19890436120
申请日期
1989.11.13
申请人
ALBERTA LTD.
发明人
CLAYSON, PETER D.
分类号
F16K3/12;F16K27/04
主分类号
F16K3/12
代理机构
代理人
主权项
地址
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