The official name for a "pipe-pulling machine" is a *horizontal directional drilling rig*; however, in the field, it goes by a host of nicknames: pipe-jacking machine, trenchless drilling rig, pipe-towing machine, and so on. All these names, in fact, refer to the same category of equipment-a remarkable machine capable of "pulling" pipes underground without the need to excavate massive trenches.
Much like how a mobile phone can be referred to as both a "smartphone" and a "mobile terminal," the various names for this machine largely depend on the specific application scenario and the functional aspect being emphasized. For instance, "pipe-jacking machine" highlights the action of "jacking" or pushing; "trenchless drilling rig" underscores the key feature of "no excavation required"; while the colloquial term "pipe-pulling machine" is the most down-to-earth, directly pinpointing the core function of "pulling" the pipes.
