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发明名称
UNDERWATER ULTRASONIC TRANSMITTER/RECEIVER
摘要
申请公布号
JPH01277787(A)
申请公布日期
1989.11.08
申请号
JP19880108450
申请日期
1988.04.30
申请人
NEC CORP
发明人
NADA TAKATOSHI
分类号
H04R17/00;G01S7/52;G01S7/521
主分类号
H04R17/00
代理机构
代理人
主权项
地址
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