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发明名称
PRESSURE CONTROL LOUDSPEAKER ENCLOSURE
摘要
申请公布号
CA426655(A)
申请公布日期
1945.04.10
申请号
CAD426655
申请日期
申请人
JOSEPH TOPPING, JR.
发明人
JOSEPH TOPPING, JR.
分类号
主分类号
代理机构
代理人
主权项
地址
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