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发明名称
AN ELECTRIC INSULATION MINERAL MASS FOR HEATING ELEMENTS
摘要
申请公布号
PL147681(B1)
申请公布日期
1989.07.31
申请号
PL19860259622
申请日期
1986.05.21
申请人
发明人
分类号
C04B33/26;H01B3/12;(IPC1-7):H01B3/12
主分类号
C04B33/26
代理机构
代理人
主权项
地址
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