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发明名称
COMMAND STAND CALLING SYSTEM FOR USING RING DOWN LINE
摘要
申请公布号
JPH04216254(A)
申请公布日期
1992.08.06
申请号
JP19900402633
申请日期
1990.12.17
申请人
NEC ENG LTD
发明人
KOBAYASHI YOSHIAKI
分类号
H04M3/42
主分类号
H04M3/42
代理机构
代理人
主权项
地址
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