Obvious energy saving effect, long life-span and low maintenance cost.
节能效果明显，使用寿命长，维护费用低。
The energy saving effect is obvious under the attracting working condition in a long time.
长期吸合工作状态下，节能效果明显。
The initial energy-saving effect is more obvious than after;
节能效果在初始段较为明显，而后效果不明显；
The initial energy-saving effect is more obvious than after;
节能效果在初始段较为明显，而后效果不明显；
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