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发明名称
Dust collecting and optical measuring device
摘要
申请公布号
US2489286(A)
申请公布日期
1949.11.29
申请号
US19460670423
申请日期
1946.05.17
申请人
SPECIALTIES DEVELOPMENT CORPORATION
发明人
JR. HARRY C. GRANT,
分类号
G01N1/22;G01N15/06
主分类号
G01N1/22
代理机构
代理人
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地址
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