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发明名称
KEY TELEPHONE SET
摘要
申请公布号
JPH0355947(A)
申请公布日期
1991.03.11
申请号
JP19890192859
申请日期
1989.07.25
申请人
NEC CORP;NEC ENG LTD
发明人
OYAMA HIROSHI;YOSHIDA HITOSHI
分类号
H04M1/50
主分类号
H04M1/50
代理机构
代理人
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