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发明名称
Union
摘要
申请公布号
US2520215(A)
申请公布日期
1950.08.29
申请号
US19470723963
申请日期
1947.01.24
申请人
KERR RALPH L
发明人
KERR RALPH L.
分类号
F16L37/127
主分类号
F16L37/127
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