prov:value
| - The toner conveyance tube 149 may be flexible and have a diameter of from 4 to 10 mm, and may be made of rubber such as polyurethane, nitrile, EPDM, silicon, etc., having superior resistance to degradation by toner, so that the tube can be easily arranged in an optional direction such as upward, downward, rightward, leftward, etc.
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