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经营范围
发明名称
Ultrasonic device
摘要
申请公布号
GB770934(A)
申请公布日期
1957.03.27
申请号
GB19550008728
申请日期
1955.03.25
申请人
CARL LEROY MENG
发明人
分类号
G10K7/00
主分类号
G10K7/00
代理机构
代理人
主权项
地址
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