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经营范围
发明名称
Gas detection apparatus
摘要
申请公布号
US2153568(A)
申请公布日期
1939.04.11
申请号
US19370141990
申请日期
1937.05.11
申请人
INEZ L. CRAGIN;CHESTER W. JOHNSON;RICHARD N. DRESSER
发明人
JOHNSON CHESTER W.
分类号
G01N21/86
主分类号
G01N21/86
代理机构
代理人
主权项
地址
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