The slow speed crane for hoisting, assembling and repairing steam turbines and the grab crane for hoisting coal are mostly used in the thermal power industry. In order to meet the requirements of steam turbine assembly, the coordinated crane can meet the requirements of site application. Grab coal crane is used frequently, the working level is higher, the reactive power grab equipped with the synergistic crane, the lifting speed can reach 30-45 M / min, greatly improving the production efficiency.