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经营范围
发明名称
Dross remover
摘要
申请公布号
US2699933(A)
申请公布日期
1955.01.18
申请号
US19520317280
申请日期
1952.10.28
申请人
NORTHROP AIRCRAFT, INC.
发明人
SR. JOHN T. SIEFERT,
分类号
F27D3/15
主分类号
F27D3/15
代理机构
代理人
主权项
地址
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