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发明名称
Economizer
摘要
申请公布号
US1916004(A)
申请公布日期
1933.06.27
申请号
US19310529873
申请日期
1931.04.13
申请人
LANGFORD GEORGE W
发明人
LANGFORD GEORGE W.
分类号
F24H9/20
主分类号
F24H9/20
代理机构
代理人
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