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发明名称
DORAMUKANBUTAKAIHEISOCHI
摘要
申请公布号
JPH0233120(B2)
申请公布日期
1990.07.25
申请号
JP19830102144
申请日期
1983.06.07
申请人
NGK INSULATORS LTD
发明人
OKAMOTO MAGOJI
分类号
G21F9/36;G21F9/30
主分类号
G21F9/36
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