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发明名称
APPARATUS FOR MEASURING GROUP VELOCITY OF ULTRASONIC WAVE PROPAGATION IN LIQUID MEDIA
摘要
申请公布号
PL151084(B2)
申请公布日期
1990.07.31
申请号
PL19880273476
申请日期
1988.07.01
申请人
发明人
分类号
G01H;G01H5/00;(IPC1-7):G01H5/00
主分类号
G01H
代理机构
代理人
主权项
地址
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