double-twin coil shank

例句：

1. 1. The new design uses a double-twin coil to improve the efficiency of the motor.
   新设计使用了一个双孪线圈来提高电机的效率。
2. 2. The engineer used a double-twin coil to create a more powerful generator.
   工程师使用了双孪线圈来制造一个更强大的发电机。
3. 3.The double-twin coil was crucial in the development of the new car's engine.
   双孪线圈在新型汽车发动机的开发中起到了关键作用。