A handheld external magnet was used to manipulate this capsule in the esophagus and stomach.

一枚体外磁铁用来操纵胃内及食管内的胶囊内镜。

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This is a specially designed magnet that allows an operator to steer the capsule around using external magnetic fields generated in a belt worn by the patient when he is being examined.

它是由一个特制的磁体制成，患者接受检查时会佩戴一条带子以产生一个外部磁场，这样医生就可以通过这个外部磁场来控制胶囊的方位。

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It is analyzed in details the control of permanent magnet synchronous motor in the light of external synchronous control, self synchronous control and weak magnet control.

对水磁同步电动机的控制从外同步控制、自同步控制及弱磁控制等几方面进行了详细分析。

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