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In an extruder-type 3D printer, the two components that possibly move when the print job progresses are _________.

A Extruder nozzle.

The print bed in many extruder-type 3D printers glides down as the print job progresses and may move front to back during layer printing, while the extruder nozzle moves left to right, creating the 3D item one layer at a time.

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