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发明名称
Improvements in parallel slide valves
摘要
申请公布号
GB353556(A)
申请公布日期
1931.07.30
申请号
GB19300014067
申请日期
1930.05.07
申请人
JOHN DEWRANCE
发明人
分类号
F16K27/08
主分类号
F16K27/08
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代理人
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