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经营范围
发明名称
Boiler economizer
摘要
申请公布号
US1951752(A)
申请公布日期
1934.03.20
申请号
US19330674179
申请日期
1933.06.03
申请人
DOERR EDWARD A
发明人
DOERR EDWARD A.
分类号
F22D1/08
主分类号
F22D1/08
代理机构
代理人
主权项
地址
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