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发明名称
Speaker system
摘要
A speaker system comprising a speaker unit, a drone cone driven by the speaker unit; and a removable weight loaded on the front of the drone cone which can be exchanged from the front of the drone cone.
申请公布号
US4131180(A)
申请公布日期
1978.12.26
申请号
US19770778998
申请日期
1977.03.18
申请人
TRIO KABUSHIKI KAISHA
发明人
MAEDA, YOICHI
分类号
G10K13/00;H04R1/28;(IPC1-7):G10K13/00;H04R7/00
主分类号
G10K13/00
代理机构
代理人
主权项
地址
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