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发明名称
MANUFACTURE OF VITREOUS HARD CARBONACEOUS DIAPHRAGM HAVING COMPRESSIONAL CONSTRUCTION
摘要
申请公布号
JPH01185098(A)
申请公布日期
1989.07.24
申请号
JP19880008395
申请日期
1988.01.20
申请人
MITSUBISHI PENCIL CO LTD
发明人
SUDA YOSHIHISA
分类号
H04R7/02;H04R31/00
主分类号
H04R7/02
代理机构
代理人
主权项
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