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经营范围
发明名称
Carbonaceous diaphragm
摘要
申请公布号
GB2232847(A)
申请公布日期
1990.12.19
申请号
GB19890012883
申请日期
1989.06.05
申请人
* MITSUBISHI PENCIL CO LTD
发明人
MITSURU * YOSHIDA
分类号
C04B35/52;C04B35/532;H04R7/02;H04R31/00
主分类号
C04B35/52
代理机构
代理人
主权项
地址
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