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经营范围
发明名称
CLOSED SWITCH BOARD
摘要
PURPOSE:Increasing the natural frequency by getting small the deflection caused by external force, to improve an earth quake-proof property.
申请公布号
JPS5221632(A)
申请公布日期
1977.02.18
申请号
JP19750097569
申请日期
1975.08.13
申请人
HITACHI LTD
发明人
SATOU YOSHIROU;YOSHIKAWA ISAO
分类号
H02B1/54
主分类号
H02B1/54
代理机构
代理人
主权项
地址
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