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发明名称
POLARITY DETECTION CIRCUIT
摘要
申请公布号
JPH02223292(A)
申请公布日期
1990.09.05
申请号
JP19890044242
申请日期
1989.02.23
申请人
NEC CORP
发明人
TSUCHIYA KAZUTOSHI
分类号
H03K17/78;H04M1/00;H04Q3/42
主分类号
H03K17/78
代理机构
代理人
主权项
地址
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