| 摘要 |
PURPOSE:To provide a pipe wall cleaning device dealing with the situation where the diameter of a sewer pipe is changed and the state of soil of the sewer pipe is changed. CONSTITUTION:A truck has four wheels provided vertically in two stages and the space between the upper and lower wheels is variable. Next, an attachment 4 is freely attachably and detachably connected to the front of the truck so that a pipe wall cutting means protrudes from the attachment 4 to the pipe wall by centrifugal force. |
