- Turning White Hi-tech Knob with Effectiveness Inscription From Minimum To Maximum
- Efficiency Male in Official Suit Touching Screen Effectiveness OptimizationBy chipleader
- Rotating Knob with Effectiveness Inscription
- Turning White Hi-tech Knob with Effectiveness Caption
- Red and Black Efficiency Meter or Indicator
- Medical Worker Holding Sand Hourglass on Palm, Terminal Disease, Life ExpiringBy chipleader
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