overspeed test rpm 超速试验转速
overspeed test rpm chart 超速试验转速图
engine rpm test 发动机每分钟转数试验
engine rpm test check 发动机每分钟转数试验检查
RPM for Ruby on Rails has a developer Mode, the raw performance data being saved locally and can be used by developers to test the performance of their application during development phase.
RPM for Ruby on Rails拥有开发者模式，它会把原始的性能数据保存在本地，开发者可以使用这些数据在开发阶段测试他们的应用程序的性能。
To make an rpm-drop test, a tachometer is needed .
做每分钟转速下降试验时，需要一个转速表。
Each test rig is equipped with a D. C brake-generator (110 kW, 1000 rpm).
每个试验台安装一台直流制动发电机（110KW，1000rpm）。
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