In hydraulic transmission system, turning moment and rotational speeds of pump impellers and turbines have to be kept steady in order for the normal operation of the system.
在液力传动系统中，泵轮和涡轮的转矩及转速应保持稳定才能使系统正常运行。
The normal operation of the light system directly is related to the peace of aircraft landing. In view of the importance of the airport light, it must be kept in normal working condition.
助航灯光系统的运行正常和否直接关系到飞机起降的平安，鉴于机场助航灯光对于飞机起降安全的重要性，所以必须一直保持设备始终处于正常工作状态。
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