| http://www.w3.org/ns/prov#value | - In the above arrangement, for the charge transport layer, it is preferable to employ a layer having a displacing rate of carrier therethrough higher than 10-7 V???cm/sec., and for the charge transport material to be contained in the above layer, such a material as will transfer either electron or hole according to the charging polarity of the particulate material such as toner or the like to be tr
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