由在役抽油机故障的现场数据来判定其寿命统计模型，实现对抽油机使用可靠性的定量评定。
According to the failure site data of the well pumping unit in active service, its life statistical model is determined and the service reliability is evaluated quantitatively.
在确定单体VRLA蓄电池可靠性参数时，可通过现场使用调查或加速寿命试验的办法来求得。
Reliability parameters of VRLA battery cell may be gotten by on-the-spot application investigation and accelerated life testing.
现场使用结果表明，PC电控装置的性能指标和可靠性远远优于老式TKD电控装置，具有显著的经济效益。
The results of on_the_spot has showed that performance target and reliability of model PC electric control device are better than those of the old ones(TKD).
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