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发明名称
Improvements in apparatus for the transmission or reception of supersonic waves
摘要
申请公布号
GB568577(A)
申请公布日期
1945.04.11
申请号
GB19420017936
申请日期
1942.12.17
申请人
HELGE FABIAN ROST;PER HARRY ELIAS CLAESSON
发明人
分类号
B06B1/08
主分类号
B06B1/08
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