Based on the principle that reflected light intensity is proportion to the distance in some extent, a non-touch on-line optical fiber measurement for roller wears is presented.
基于反射光强与位移在一定范围内成正比的原理，提出了用反射式光纤传感器对轧辊磨损度进行非接触式在线检测的方法。
Multiple ways to navigate. You've got the touch screen, roller ball, full qwerty keyboard and the four buttons below the screen.
他又触摸屏，滚动球，标准的传统键盘和屏幕下的四个按钮。
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