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经营范围
发明名称
Improvements in or relating to valve gear for steam engines
摘要
申请公布号
GB390499(A)
申请公布日期
1933.04.04
申请号
GB19310022118
申请日期
1931.08.04
申请人
WILLIAM HENRY TUBBS
发明人
分类号
F01L31/08
主分类号
F01L31/08
代理机构
代理人
主权项
地址
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