Common consumable parts of cartridge

Take HP Monochromatic products for example  

1.    TONER  

2.    Organic Photo-Conductor (OPC)  

3.    Magnetic Roller (MR)  

4.    Primary Charge Roller (PCR)  

5.    Doctor Blade (DB)  

6.    Wiper Blade (WB)  

7.    Developer Roller (DR)  

8.    Supply Roller (SR)  

9.    Transfer Roller (TR)     

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