History always service for the life, it provides example of evaluation in the past, or put the present moment generating evolution.
历史总是为生活服务的，它提供范例，评价过去，或者把目前这个时刻安放在生成演变中去。
Service life prediction is an important aspect of structural safety evaluation.
使用寿命预测是结构安全性评估的一个重要方面。
Evaluation of the service life of a rotary drilling line is of great importance to ensuring safe drilling and reducing drilling cost.
钢丝绳使用寿命评定对确保钻井安全与降低钻井成本具有十分重要的意义。
There are many kinds of pipelines in real workpiece. The cylindricity error evaluation and inner surface display of pipe are significant for evaluating performance and service life.
工件中常包含各种各样的管道，对管道的圆柱度误差测量和内表面显示对评定工件的整体性能和使用寿命有着重要意义。
For difficult making of broach service life experiment and not accurate test which affects the professional check and evaluation.
介绍了拉刀功能试验的方案、评分办法、评分指标等。
For difficult making of broach service life experiment and not accurate test which affects the professional check and evaluation.
介绍了拉刀功能试验的方案、评分办法、评分指标等。
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