The fanless design ensures complete noiselessness and maintenance-free operation.
无风扇设计，无噪音维护便捷。
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。
The practice proves that this system can be effectively increase the level of free maintenance and operation reliability of DC adjusting speed control system.
实践证明，该系统能有效提高直流调速传动控制系统的运行可靠性及免维护水平。
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。
Characters of this device are:simple handing, steady operation, high accuracy and maintenance free.
该编码器定尺操作简便，运行稳定，达到了高精度、免维护的效果。
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 Services cover all activities necessary for trouble-free crane operation.
维修服务包括提供所有为保证起重机安全可靠的一切必要措施。
Maintenance Services cover all activities necessary for trouble-free crane operation.
维修服务包括提供所有为保证起重机安全可靠的一切必要措施。
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