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发明名称
RINGING PRE-TRIP TESTING SYSTEM
摘要
申请公布号
JPH02105755(A)
申请公布日期
1990.04.18
申请号
JP19880258539
申请日期
1988.10.14
申请人
NEC CORP
发明人
TODO KENTARO
分类号
H04M3/08;H04M3/02;H04M3/22
主分类号
H04M3/08
代理机构
代理人
主权项
地址
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