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发明名称
摘要
申请公布号
JPS5750991(B2)
申请公布日期
1982.10.29
申请号
JP19770049684
申请日期
1977.04.28
申请人
发明人
分类号
F16L3/10;F16L3/04;F16L3/16;F16L7/00
主分类号
F16L3/10
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