1. TCT7535-20 tower crane excellent performance 1 short arm long lifting performance, suitable for PC building construction 2 high lifting speed 60M independent height, maximum lifting weight 20 tons. 2 hoisting rope is regular, steel rope has long service life 2, product adaptability 1 Crane has 75/70/65/60/55/50/45/40M equal arm length combination 2 * 2 * 3 m 2 hoisting mechanism with high power and large capacity is optional, to meet the construction requirements of super-high projects; 3, the maintenance boom has manual configuration and electric configuration options; 3, the degree of intelligence is high 1 fault self-diagnosis technology, when the tower crane has a fault, the current fault and historical fault can be queried through the fault record, remote Management Technology, realize equipment information management, working condition, alarm data recording, tracking and analysis, remote control and so on. 3 jack-up working mode identification and speed limit of rotation and change amplitude; 4 Construction Safety Protection, dangerous working state identification and alarm of lifting anchor object;