Tower crane 1.CE,CQC, ISO Certification 2.Factory was founded at 1961,1600 workers. 3.Perfect after-sales service Tower CraneFeatures:This series ... of tower cranes have a horizontal jib frame, a jib-trolley radius-changing mechanism and ... factory is founded at 1961,covers 160000m2,has 1600 employees Tower crane TC6516Q(QTZ160)