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经营范围
发明名称
Water heater
摘要
申请公布号
US1829334(A)
申请公布日期
1931.10.27
申请号
US19280274534
申请日期
1928.05.02
申请人
BIRTCH FRED W
发明人
BIRTCH FRED W.
分类号
F24H1/20
主分类号
F24H1/20
代理机构
代理人
主权项
地址
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