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US5411778A Rollers for use in electrophotographic development 失效
滚筒用于电子照相显影

Rollers for use in electrophotographic development
Abstract:
The present invention relates to a roller for use in electrophotographic development comprising a rigid substrate and a polymeric covering comprising metal 1,3 bis perfluoroalkyl (1,3 dioxopropane) mixed in a polymer.
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