The flywheel energy storage unit, which replaces the conventional chemical battery, is maintenance free, has long life and emits no pollution.
飞轮储能单元代替传统的化学电池，具有免维护、寿命长、无污染的特点。
Maintenance related to battery replacement is a concern for building operators, and this unit reduces the need for frequent battery changes.
维修与更换电池也是建筑运营商关切的一个问题，而这一产品也降低了经常更换电池的需求。
Maintenance related to battery replacement is a concern for building operators, and this unit reduces the need for frequent battery changes.
维修与更换电池也是建筑运营商关切的一个问题，而这一产品也降低了经常更换电池的需求。
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