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On a new electric hospital bed, the buttons on the side rail are arranged in a s...
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On a new electric hospital bed, the buttons on the side rail are arranged in a single row with identical shapes, and staff often raise the head section when they meant to raise the foot. The redesign places the head-section control at the head end and the foot-section control at the foot end of the rail. Which control-design principle does this redesign mainly apply?
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