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发明名称
Doseur de gaz carbonique
摘要
申请公布号
FR855013(A)
申请公布日期
1940.04.30
申请号
FRD855013
申请日期
1939.01.14
申请人
发明人
PRAT EMILE
分类号
C01B31/20
主分类号
C01B31/20
代理机构
代理人
主权项
地址
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