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经营范围
发明名称
Steam heating system
摘要
申请公布号
US1886223(A)
申请公布日期
1932.11.01
申请号
US19310547767
申请日期
1931.06.29
申请人
RAYMOND FRED I
发明人
RAYMOND FRED I.
分类号
F24D1/00
主分类号
F24D1/00
代理机构
代理人
主权项
地址
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