永常

永常永常
  1. MRI设备是一种高端医疗诊断设备,其磁体结构分为永磁型、常导型和超导型三种。

    As a high medical diagnostic equipment , the main magnet member of MRI can be classified as three types , i.e. permanent magnet , magnet excited by coils and superconducting magnet .

  2. 愿母亲笑声永荡,歌声常鸣!

    I wish Mama could keep her laughter and her song eternally .