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发明名称
Portable sounding apparatus
摘要
申请公布号
US3151699(A)
申请公布日期
1964.10.06
申请号
US19630271950
申请日期
1963.04.10
申请人
PEAVEY HARTLEY D
发明人
PEAVEY HARTLEY D.
分类号
H04R1/02
主分类号
H04R1/02
代理机构
代理人
主权项
地址
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