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1·When strength degenerates, reliability decreases with time more obviously, and the failure rate has the feature of a bathtub curve.

强度退化时，可靠度随时间降低较为明显，失效率具有“浴盆”曲线的特征。

2·As the Stirling cryocoolers' reliability is at foreside of bathtub curve, the earlier failure problem of refrigerator, which results from manufacture and assembly process, should be solved.

针对国内斯特林制冷机可靠性处于浴盆曲线前端的现状，提出当前斯特林制冷机工程化解决加工、装配误差等引起早期失效的问题。

3·The oil flow rate distribution curve mainly has an S shape, and the heat transfer rate shows a bathtub distribution.

油冷器各层芯片流量分配曲线大致呈S形分布，而换热量分配曲线呈浴盆状分布。