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经营范围
发明名称
PULSE ECHO SYSTEM
摘要
申请公布号
CA462993(A)
申请公布日期
1950.02.07
申请号
CAD462993
申请日期
申请人
CANADIAN GENERAL ELECTRIC COMPANY
发明人
FRANKLIN G. PATTERSON
分类号
主分类号
代理机构
代理人
主权项
地址
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