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经营范围
发明名称
ULTRASONIC ELEMENT
摘要
申请公布号
JPH01270500(A)
申请公布日期
1989.10.27
申请号
JP19880099741
申请日期
1988.04.22
申请人
HITACHI METALS LTD
发明人
SADAMURA SHIGERU
分类号
H04R17/00
主分类号
H04R17/00
代理机构
代理人
主权项
地址
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