... 1961,1600 workers. 3.Perfect after-sales service tower craneFeatures:This series of tower cranes has a horizontal jib frame, a jib ... . Slewing System5. Electrical System6. Crane Jib7. Counter Jib8. Mast Sections9. Tower Head10. Control CabinSpecification:ModelTC4810(QTZ50)TC4708(QTZ40)TC4708A(QTZ40)Amplitude ... founded at 1961,covers 160000m2,has 1600 employees. TC4708A(QTZ40) Construction tower crane