Miniaturized electronics deserve some of the credit, but so do ever shrinking motors.Most of them exploit the same physics principles as their bigger kin;the key is design and manufacturing ingenuity.

• 小型马达和其他小型电子元件一样，都具有某种程度的可靠度，它们所应用的物理原理，大多跟较大的同类机件相同，因此重点在于如何设计并制造出这类精巧的装置。