Even the slightest contact of your electron-rich finger with the screen's glass is enough to activate the capacitive sensing system below.
来自带电的手指表层最细微的接触也能激活屏幕下方的电容感应系统。
2
The author introduces a pipe defect locating method by contact type ultrasonic detection — finger oil dipping touching method and analyses the theoretical basis of defect locating by this method.