| http://www.w3.org/ns/prov#value | - An image forming apparatus, comprising: means for bearing bear an electrostatic latent image formed on a surface thereof; and means for developing the electrostatic latent image into a toner image with toner, comprising: means for containing a developer including a toner and a carrier; means for delivering the developer toward the means for bearing; and means for detecting deterioration of the dev
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