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发明名称
DIRECTIONAL ELECTRO-ACOUSTIC TRANSDUCERS COMPRISING A SEALED SHELL CONSISTING OF TWO PORTIONS
摘要
申请公布号
GB8909399(D0)
申请公布日期
1993.05.26
申请号
GB19890009399
申请日期
1989.04.25
申请人
ETAT FRANCAIS REPRESENTED BY THE GENERAL DELEGATE FOR ARMAMENTS
发明人
分类号
G10K9/12
主分类号
G10K9/12
代理机构
代理人
主权项
地址
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