We must first clear of the old line, when constructed line, motor drive the cutter made of hard metal alloy to revolve at high speed, then erase old line.

• 在有残损热熔标线的路面进行划线施工时应首先用清除机将旧标线清除干净。该机使用发动机带动硬质合金制成的打磨头高速旋转，打磨头在旋转离心的作用下与路面凸起部分磨合，将旧线清除。