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发明名称
Heater construction
摘要
申请公布号
US1843726(A)
申请公布日期
1932.02.02
申请号
US19290373016
申请日期
1929.06.22
申请人
SAFETY MINING COMPANY
发明人
LAWSON LAWRENCE E.
分类号
F42B3/10
主分类号
F42B3/10
代理机构
代理人
主权项
地址
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