Horizontal directional drilling machines and their auxiliary equipment, guidance instruments, drill tools, mud materials, and technology, etc.

Impact矛s and夯pipe夯driving锤equipment, tools, and pipe-laying technology, etc.; Shield tunneling machine and its auxiliary equipment, guidance instruments, drill tools, mud materials, and technology, etc.

Pipe jacking machine and its auxiliary equipment, guidance instruments, drill tools, mud materials, and technology, etc.

Plastic pipes, cement pipes, resin concrete pipes, etc., as well as anti-corrosion materials, etc.

Underground pipeline cleaning equipment, tools, and technology, etc.; Underground pipeline repair equipment, tools, materials, and technology, etc.

Underground pipeline replacement equipment, tools, and technology, etc.

Underground pipeline detection instruments and technology, etc.; Underground pipeline detection instruments and technology, underground pipeline quality evaluation technology, risk assessment technology, etc.

Underground pipeline management information system, no-dig construction technology, design software, and monitoring software, etc.

Various pipeline welding machines, auxiliary equipment for no-dig construction, etc.; Related no-dig construction supporting equipment, tools, components, etc.