flying head

flying-head的词性：
n.（名词）

1. A device that is designed to read and write information on a moving magnetic surface, as on a disk or drum, while being supported above the surface by a thin cushion of air.
浮动磁头：为在磁盘或磁鼓上读写而设计的装置，它离转动磁面的距离非常小，并由空气膜托起