What are the trenchless construction equipment?

There are three categories from large to small: the first category is shield machines for constructing subway tunnels, the second category is hydraulic jacks for constructing large sewage pipelines, and the third category is for laying small power and communication pipelines. directional drilling rig. The first category includes: three shield chambers, GPS operating platform, track, ventilation equipment, power station, generator set, mud equipment, gantry crane, etc. The second category includes: micro shield, total station, jack, power station, generator set, triangle crane, mud pump, crane, etc. The third category includes: directional drilling rigs, detectors, guides, mud tanks, welding machines, etc.