| 摘要 |
In the procedure for the installation of plastic pipe pieces with lateral branch openings into sewage pipes to be repaired, the first step is the measuring in the longitudinal axial direction of the branch of the sewage pipe from the inside with respect to the already installed piece of plastic pipe. After that, a lateral opening is formed in the plastic pipe while the pipe is above ground and outside of the sewage pipe. Next, the already prepared plastic pipe is joined in an aligned position with the already installed plastic pipe, with the help of a movable transporter inside the sewage pipe. |
