经分析，导致国产混合陶瓷球轴承使用寿命下降的主要原因是保持架的提前失效。
The pre-failure of the cage is the main cause leading to the decrease of domestic ceramic ball bearing life.
试验结果表明，在相同试验工况下，混合陶瓷球轴承的使用寿命低于全钢轴承，但是其沟道表面的磨损情况优于全钢轴承。
Test results show that the life of ceramic ball bearing is lower than steel ball bearing under the same working condition, but the wear condition of its ring is better.
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