Thanks to the narrow detection area of the double sensor, there is no danger of a pinch point causing harm to the operator or allowing clogging from ice or dirt.
双传感器的检测区域足够狭窄，因而不会产生挤压点导致操作人员受伤，或冰块、灰尘形成的堵塞。
2
Drifting chunks of ice can get caught near them, clogging up the flow of water forming a dam.