以下为句子列表：
英文: Principles: Permanent Magnet Lifter has strong magnetic path produced by Nd-Fe-B magnetic materials .On and off of the magnetic path is controlled by turning the manual handle.Permanent magnetic lifters have magnet as power.and its lifting power will neve
中文: 永磁起重器是由强磁钕铁硼磁性材料组成磁路系统，产生强磁，通过手柄的旋向，控制磁路关闭，达到工作目的，永磁起重器采用磁做动力，工作长久不变。
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