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经营范围
发明名称
Improvements in and relating to reducing valves
摘要
申请公布号
GB540026(A)
申请公布日期
1941.10.02
申请号
GB19400007252
申请日期
1940.04.22
申请人
JOHN GRAHAM;DAVID AULD GRAHAM;DAVID AULD & SONS LIMITED
发明人
分类号
G05D16/16
主分类号
G05D16/16
代理机构
代理人
主权项
地址
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