functional reliability的用法和样例：
例句
- Automatic control system using water pressure, water level control to improve performance, increase reliability of work.
采用气压水位自动控制系统，改善水位控制性能，提高了工作可靠性。 - The statistic comparison before and after optimization shows that the load fluctuation of cutting head is evidently reduced, which increases working reliability of roadheader.
优化前后统计数据表明，截割头的载荷波动明显降低，提高了掘进机的工作可靠性。
