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发明名称
Automatic volume control device
摘要
申请公布号
US2798687(A)
申请公布日期
1957.07.09
申请号
US19540404759
申请日期
1954.01.18
申请人
DON BAXTER, INC.
发明人
HAMILTON DONALD A.
分类号
F16K21/16
主分类号
F16K21/16
代理机构
代理人
主权项
地址
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