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发明名称
ULTRASCHALLWANDLER, BESTEHEND AUS MINDESTENS EINER REIHE VON ULTRASCHALLELEMENTEN.
摘要
申请公布号
DE68917149(D1)
申请公布日期
1994.09.01
申请号
DE19896017149
申请日期
1989.06.28
申请人
B.V. OPTISCHE INDUSTRIE "DE OUDE DELFT", DELFT, NL
发明人
DE LA FONTEIJNE, MARCEL, ROLAND, NL-2625 PS DELFT, NL
分类号
H04R17/00;B06B1/06;(IPC1-7):G10K11/34
主分类号
H04R17/00
代理机构
代理人
主权项
地址
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