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发明名称
Hollow repair device for leaky boiler tubes
摘要
申请公布号
US2517626(A)
申请公布日期
1950.08.08
申请号
US19470775330
申请日期
1947.09.20
申请人
SOLOMON BERG
发明人
BERG SOLOMON
分类号
F16L55/132;F28F11/04
主分类号
F16L55/132
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代理人
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