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经营范围
发明名称
DIAPHRAGM PLATE FILLED BY FOAMED RESIN
摘要
申请公布号
JPS5658397(A)
申请公布日期
1981.05.21
申请号
JP19790134185
申请日期
1979.10.19
申请人
HITACHI LTD
发明人
KAWAMURA SHINICHIROU
分类号
H04R7/02;H04R7/12
主分类号
H04R7/02
代理机构
代理人
主权项
地址
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