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发明名称
Improvements relating to valves
摘要
申请公布号
GB664189(A)
申请公布日期
1952.01.02
申请号
GB19490004166
申请日期
1949.02.15
申请人
RONALD TRIST & CO. LIMITED;HERBERT BERNARD THOMAS
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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