An approach is provided for manufacturing a LCD apparatus. An electrophotographic apparatus using the electrophotographic photoreceptor uses a compound having an excellent electron transporting ability in a photosensitive layer of the electrophotographic photoreceptor. Each of the portions can define a reuse set. Beside, the permanent magnet canned motor pump provides a heat dissipation mechanism while meeting the structural need of the corrosion-protection housing, so that the motor can dissipate heat in a sufficient rate.