The complete set of equipment can be buried underground, hence it is also called "underground domestic sewage treatment equipment."

The complete set of equipment can be buried underground, hence it is also called "underground domestic sewage treatment equipment."

The complete set of equipment can be buried underground, hence it is also called "underground domestic sewage treatment equipment."

The complete set of equipment can be buried underground, hence it is also called "underground domestic sewage treatment equipment."

The complete set of equipment can be buried underground, hence it is also called "underground domestic sewage treatment equipment."