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经营范围
发明名称
METHOD FOR PRODUCING A MAGNETIC POWDER
摘要
申请公布号
GB1524124(A)
申请公布日期
1978.09.06
申请号
GB19760013294
申请日期
1976.04.01
申请人
NIPPON GAKKI SEIZO KK
发明人
分类号
H04R9/00;B22F5/10;H01F7/02;H01F41/02;H04R31/00;(IPC1-7):B22D25/00;B22F3/24
主分类号
H04R9/00
代理机构
代理人
主权项
地址
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