Magnetic, direct d. c. drive built for continuous, maintenance free operation.
直接磁力驱动技术，免维护，长期连续运转。
Maintenance free operation, no need to add water, no equalizing charge required.
设计简洁，免维护，无需补水，不需均衡充电。
Their electronically commutated brushless DC motor provides virtually maintenance-free operation over time by eliminating brush maintenance and associated brush motor failure.
其电子换向直流无刷电机通过排除刷子维护和关联电机的出错，在操作过程中提供免维护操作。
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