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经营范围
发明名称
Smoke and combustion indicator
摘要
申请公布号
US1961943(A)
申请公布日期
1934.06.05
申请号
US19320633330
申请日期
1932.09.15
申请人
POWELL ALBERT E
发明人
POWELL ALBERT E.
分类号
G01N21/29
主分类号
G01N21/29
代理机构
代理人
主权项
地址
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