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经营范围
发明名称
Improvements in or relating to plug valves
摘要
申请公布号
GB725400(A)
申请公布日期
1955.03.02
申请号
GB19530016855
申请日期
1953.06.18
申请人
ALEXANDER SAMUEL VOLPIN
发明人
分类号
F16K5/22
主分类号
F16K5/22
代理机构
代理人
主权项
地址
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