机械设备完好率的英文：
rate of equipment usability
n. 比率，速率；费用
v. 评估；认为；划分等级；值得
cumulative rating
累积收听率
These bonds have an AAA rating.
这些债券的信用度是3A级的。
To rate too low;underestimate.
低估对…估价太低；低估
n. 设备，装备；器材
We have electrified education equipment and audition teaching equipment.
我们有电教设备、听力教学设备。
jewel bearing manufacturing equipment
宝石轴承生产设备
Guarantee/warrantee of the manufacturer for the equipment
制造商为设备提供的担保
n. 可用性
usable or operative or practiced in all kinds of weather.
在任何天气下都可使用、都有效或都可运行。
The act of obtaining usable substances from unusable sources.
废物利用从无用的东西中获取有用物质的行为
To procure(usable substances)from refuse or waste products.
回收利用从废物或废品中获取(可用之物质)