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发明名称
摘要
申请公布号
USRE33934(E)
申请公布日期
1992.05.26
申请号
US19890417241
申请日期
1989.10.04
申请人
发明人
分类号
F16L33/035;F16L33/04
主分类号
F16L33/035
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