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发明名称
Sealing closure
摘要
申请公布号
US1992431(A)
申请公布日期
1935.02.26
申请号
US19310542794
申请日期
1931.06.08
申请人
KEY BOILER EQUIPMENT CO.
发明人
KEY FREDERICK E.
分类号
F22B37/22
主分类号
F22B37/22
代理机构
代理人
主权项
地址
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