upper coil

例句：

1. 1. The upper coilof the transformer is where the poweris generated.
   变压器的上部线圈是产生电力的地方。
2. 2. The upper coil was damaged during themanufacturing process.
   在制造过程中，上部线圈受损了。
3. 3. The uppercoil is responsible for carrying themagnetic field from the core to theprimary winding.
   上部线圈负责将磁场从铁芯传递到初级绕组。