Abacus Mobile crane  is widely used for the lifting operations in general engineering projects, such as construction site, urban renewal, communication and transportation, ports, bridge, oilfields and mine, and complex working environments. The telescoping mode is updated from sequential telescoping to random telescoping. The change of boom length is more efficient, and the performance of medium- long boom is higher. Independent cooling technology of the hydraulic motor can make the thermal balance temperature of the hydraulic system below 80℃ . It can work normally in the high temperature environment and thus the hoisting operation is safe and reliable.