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经营范围
发明名称
Improvements in relief valves
摘要
申请公布号
GB723375(A)
申请公布日期
1955.02.09
申请号
GB19520018949
申请日期
1952.07.26
申请人
DOWTY EQUIPMENT LIMITED
发明人
ABBOTT HERBERT GEORGE
分类号
E21D15/51;F16K17/04;G05D16/10
主分类号
E21D15/51
代理机构
代理人
主权项
地址
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