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发明名称
VORRICHTUNG ZUM AUSSENDEN ODER EMPFANGEN VON SCHALLSIGNALEN UNTER WASSER.
摘要
申请公布号
DE1737741(U)
申请公布日期
1957.01.10
申请号
DE195500E6978U
申请日期
1955.04.07
申请人
ELECTROACUSTIK GESELLSCHAFT M.B.H.
发明人
分类号
主分类号
代理机构
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