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发明名称
摘要
申请公布号
JPS6220434(B2)
申请公布日期
1987.05.07
申请号
JP19770132488
申请日期
1977.11.07
申请人
HITACHI LTD
发明人
OONUKI YOSHIHISA
分类号
F16L41/08;F16L9/14;F16L41/00
主分类号
F16L41/08
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