How do I read engine speed per unit RPM?
If it is in English material, read the RPM directly. These three letters are ok. In Chinese materials, read directly "turn around every minute". Simplified but nonstandard reading is "* * * * *"".
RPM is the acronym for Revolutions per minute, translated as "RPM", that is, the speed per minute. The rest of the speed n is r/s (turn per second) and m/s (meters per second), etc.
