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发明名称
Auxiliary preheating element in boilers for quick steaming and heating
摘要
申请公布号
US2291921(A)
申请公布日期
1942.08.04
申请号
US19370145058
申请日期
1937.05.27
申请人
ROBINSON ROY H
发明人
ROBINSON ROY H.
分类号
F22B37/00
主分类号
F22B37/00
代理机构
代理人
主权项
地址
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