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发明名称
Vibrating device
摘要
申请公布号
US2520044(A)
申请公布日期
1950.08.22
申请号
US19490122711
申请日期
1949.10.21
申请人
MASON DONALD E
发明人
MASON DONALD E.
分类号
B06B1/18
主分类号
B06B1/18
代理机构
代理人
主权项
地址
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