closed core transformer

例句：

1. 1.The closed-core transformer is used to convert high voltage into low voltage for power transmission.
   封闭式铁芯变压器用于将高压转换为低压以进行电力传输。
2. 2.In the closed-core transformer, the magnetic field lines are confined within the core, preventing them from leaking out.
   在封闭式铁芯变压器中，磁场线被限制在铁芯内，防止它们泄露。
3. 3. The closed-core transformer is an essential component in electrical systems, providing a stable and efficient power conversion process.
   封闭式铁芯变压器是电气系统中的关键组件，提供稳定且高效的电能转换过程。