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经营范围
发明名称
Improvements in or relating to valves
摘要
申请公布号
GB431420(A)
申请公布日期
1935.07.08
申请号
GB19340008554
申请日期
1934.03.19
申请人
JOHN DEWRANCE;CLIFFORD HARRY ARMSTRONG
发明人
分类号
F16K1/44
主分类号
F16K1/44
代理机构
代理人
主权项
地址
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