Check the working condition regularly. Replace the sealing ring after the valve is used for a long time.
定期检查运行情况，对长期使用后的伸缩器应及时更换密封圈。
This driving system can be used in any working condition.
本传动系统在各种作业条件下均可以使用。
A evaluate method of reliability is provided which is used to intelligence instrument under changeable working condition, combined with the working condition model.
结合工作条件变化模型，提出一套智能仪器产品在变化环境中可靠性评价的方法。
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