1 With a very high rate ... Description GENERALIn order to meet applications of hydrographic well drilling and engineering geological exploration or construction, fit ... self-traction device, as well as a auxiliary transmission gear box.The drilling rig can be used not ... lifting speed (3rd layer, m/s)0.82, 1.53, 2.16, 3.13Wire rope dia. ( ... do not consider power losses. Water Well Drilling Rig XY-4-3A(HOT)