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专利详情
Improvements in and relating to fluid pressure measuring instruments for testing oxygen breathing apparatus
申请公布号：
GB497775(A)
申请号：
GB19380002112
申请日期：
1938.01.21
申请公布日期：
1938.12.28
申请人：
OTTO HEINRICH DRAEGER
分类号：
G01L13/02
主分类号：
G01L13/02
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