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经营范围
发明名称
PULSE STEP SOUND AMPLIFIER
摘要
申请公布号
JPH01137706(A)
申请公布日期
1989.05.30
申请号
JP19870295060
申请日期
1987.11.25
申请人
NEC CORP
发明人
SATO HIDEO
分类号
H03F3/217;H03F3/20
主分类号
H03F3/217
代理机构
代理人
主权项
地址
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