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发明名称
SPEAKER TELEPHONE SYSTEM
摘要
申请公布号
JPS5817755(A)
申请公布日期
1983.02.02
申请号
JP19820022947
申请日期
1982.02.17
申请人
KINSEI TSUUSHIN KK
发明人
IN SHINKAKU
分类号
H04M1/60
主分类号
H04M1/60
代理机构
代理人
主权项
地址
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