("Helvetica",16) "spindle-speed-meter" "RPM" 150 0 10200 1000 100 "spindle-speed-number" ("Helvetica",14) "4.1f" ("Helvetica",16) "High" "highgear-led" 20 "Low" "lowgear-led" 20 "Change Gears" "gearchange-button"