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发明名称
摘要
申请公布号
JPS6411158(B2)
申请公布日期
1989.02.23
申请号
JP19810014254
申请日期
1981.02.04
申请人
HITACHI LTD
发明人
FURUYAMA MASAYUKI
分类号
G21B1/05;G21B1/00;G21B1/11
主分类号
G21B1/05
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