本发明将普通导磁体的头部设置成锥角形后，可缩短间隙的距离，延长铁芯有效使用的长度。
By arranging the head part of the common magnetizer to be in a taper Angle shape, the clearance distance can be shortened, and the effective use length of the iron core is extended.
本发明将普通导磁体的头部设置成锥角形后，可缩短间隙的距离，延长铁芯有效使用的长度。
By arranging the head part of the common magnetizer to be in a taper Angle shape, the clearance distance can be shortened, and the effective use length of the iron core is extended.
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