In recent years, with the rapid development of society and economy,
the demand for municipal road drainage and sewage treatment systems is particularly important.

However, in the old urban areas of some cities, the urban underground drainage system is often leaked, damaged or even broken due to the long service life of the drainage pipeline system, lack of maintenance of maintenance pipes, corrosion of soil and water media and other reasons. The drainage pipes need to be repaired.

With the development of trenchless technology,
the repair of drainage pipes can also be carried out without excavation
or with less surface excavation, which will minimize the impact on the environment and people's lives.

Compared with traditional excavation repair, trenchless repair has many advantages and is widely used.