Slecve bearing life expectance: 20,000 hours minimum.是什么意思？

Slecve bearing life expectance: 20,000 hours minimum.

含油轴承预期寿命: 至少20,000小时.

bearing

n. [机]轴承，支座，关系，方位，态度，举止；v. 忍受(bear的ing形式)；

例句
...note paper bearing the Presidential seal...
盖有总统印章的便笺

life

n. 生活，生计，生命，性命，一生，寿命，人生，尘世；

例句
In his later life he became even more absent-minded.
他晚年变得愈加健忘了。

expectance

期望；

例句
Modern school of currency and school of reasonable expectance systematized methods of substantial evidence analysis.
现代货币学派和理性预期学派将实证分析方法系统化.

hours

n. 小时( hour的名词复数 )，固定时间，一小时的时间或行程，重要时刻；

例句
The workforce have recently been calling for their working hours to be reduced. Many companies have accordingly switched to a five-day week.
工人们最近一直在呼吁缩短工作时间。许多公司于是转成了一周五天工作制。

minimum

n. 最低限度，最小量，最低消费，[数]极小

例句
About 12 inches wide is the absolute minimum you should consider...
12英寸左右的宽度绝对是你应考虑的最低值。