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发明名称
HOLDING TONE CHANGEOVER CONTROL SYSTEM
摘要
申请公布号
JPH04360358(A)
申请公布日期
1992.12.14
申请号
JP19910134875
申请日期
1991.06.06
申请人
FUJITSU LTD
发明人
MARUYAMA HIROSHI
分类号
H04M3/42;H04Q3/58
主分类号
H04M3/42
代理机构
代理人
主权项
地址
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