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Vertically void in letter (it is vertically void in letter on the printed manuscript).

Time：

Nov 14,2023

Source：

Author：

Reason:The laser is partially blocked or the magnetic roller is covered by foreign matters; the reflector is dirty or transcription components are defective; the magnetic roller coating or the doctor blade is defective; there are impurities on the magnetic roller, or the magnetic roller coating is worn.

Solution:Check the protection cover refraction rod or clean the magnetic roller cover; clean the reflector; replace the magnetic roller or doctor blade.

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