At the same time, using the control panel sensor can implement touch-free key controlling on a TV set and a display device.

同时利用该控制板传感器，实现了在电视产品以及显示器产品上的无触摸按键控制。

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Over the years, fingerprinting has evolved from an inky mess to pressing fingers on sensor screens to even a few touch-free systems that work at a short distance.

多年来，指纹识别从蘸墨手印，按压传感器到非接触采集。

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The stator surrounds—but does not touch—the rotor, which is free to rotate on its axis.

定子在转子周围地区，但不触摸转子，转子则自由地按轴转动。

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One benefit is that the tower is controlled by voice and gestures, making it touch-free and hygienic.

BBC: New York's phone boxes get new lease of life

In 1973 he cofounded Mitel, which pioneered electronic switching systems that allowed for operator-free PBXs and touch-tone phone sets.

FORBES: Celtic charm

Up to now, the Internet has been a light-touch regulatory zone, and free-market advocates have argued that its success depends on an approach that is largely hands-off.

FORBES