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发明名称
Vacuum check air valve for vapor heating systems
摘要
申请公布号
US1916695(A)
申请公布日期
1933.07.04
申请号
US19300487439
申请日期
1930.10.09
申请人
HOFFMAN SPECIALTY COMPANY
发明人
SIMPSON WILLIAM K.
分类号
F24D19/08
主分类号
F24D19/08
代理机构
代理人
主权项
地址
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