In a circuit diagram, they look like small coils, 'cause that's pretty much what they are!

在电路图中，它们看起来像小线圈 ，因为它们几乎就是这样！

In the handheld scanner, a small wire coil creates an oscillating magnetic field, which makes the glass sliver in the sticker vibrate in sympathy.

而在手持扫描仪内部的小线圈创建的一个振荡磁场使得在贴纸内的玻璃棉条同时产生震动。