| Subject | English | Chinese |
| reliabil. | mean operating time to failure | 平均失效前工作时间 |
| reliabil. | mean operating time to first failure | 平均首次失效前工作时间 |
| reliabil. | operating time to failure of an item | 失效前工作时间 产品的 |
| reliabil. | operating time to first failure of an item | 首次失效前时间 产品的 |
| reliabil. | operating time to first failure of an item | 首次失效前工作时间 产品的 |