这就把它们和在转子处使用永磁铁而非一套铝或铜导体的同步发动机区分开来。
That distinguishes them from synchronous motors that use a permanent magnet in their rotors instead of a set of aluminium or copper conductors.
这样，被转子磁场隔开的铝罐周围就会产生一个二级磁场，实际上也就能将铝罐与其它废料隔离开来。
This creates a secondary magnetic field around the cans that is repelled by the magnetic field of the rotor, literally ejecting the aluminium cans from the other waste materials.
采用涂料保护法能防止铝熔体净化用石墨转子的氧化，有效地延长其使用寿命。
The coating protection could prevent the graphite rotator for molten Alpurification from the oxidation and prolong its service life effectively.
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