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经营范围
发明名称
Gas purification process
摘要
申请公布号
US1806370(A)
申请公布日期
1931.05.19
申请号
US19260125836
申请日期
1926.07.30
申请人
THE KOPPERS COMPANY
发明人
JR. FREDERICK W. SPERR,
分类号
C10K1/12
主分类号
C10K1/12
代理机构
代理人
主权项
地址
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