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经营范围
发明名称
Combined house heating and domestic water heating system
摘要
申请公布号
US1921708(A)
申请公布日期
1933.08.08
申请号
US19330651779
申请日期
1933.01.14
申请人
EVELYN L. SNAVELY
发明人
SNAVELY EARL R.
分类号
F24D3/08
主分类号
F24D3/08
代理机构
代理人
主权项
地址
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