nib magnet造句

Beneath this plate is the moving coil, often referred to as the " voice coil " by analogy to the coil in loudspeakers, which is attached to the actuator hub, and beneath that is a second NIB magnet, mounted on the bottom plate of the motor ( some drives have only one magnet ).
It's difficult to find nib magnet in a sentence. 用nib magnet造句挺难的