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经营范围
发明名称
Improvements in or relating to safety valves
摘要
申请公布号
GB634829(A)
申请公布日期
1950.03.29
申请号
GB19470031712
申请日期
1947.12.01
申请人
WILLIAM RALPH SERGEANT
发明人
分类号
F16K17/12
主分类号
F16K17/12
代理机构
代理人
主权项
地址
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