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发明名称
Graded frequency sensors
摘要
申请公布号
US5025790(A)
申请公布日期
1991.06.25
申请号
US19890352803
申请日期
1989.05.16
申请人
HEWLETT-PACKARD COMPANY
发明人
DIAS, J. FLEMING
分类号
B06B1/06;G01H1/14
主分类号
B06B1/06
代理机构
代理人
主权项
地址
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