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发明名称
METHOD AND APPARATUS FOR THE PRODUCTION OF ELECTRET MATERIALS
摘要
申请公布号
EP0128200(B1)
申请公布日期
1986.12.10
申请号
EP19840900236
申请日期
1983.12.02
申请人
NCR CORPORATION
发明人
ANDERSON, JEFF, L.
分类号
H01G7/02;(IPC1-7):H01G7/02
主分类号
H01G7/02
代理机构
代理人
主权项
地址
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