四川长江LT1120-1起重机具有以下优点：1. 强大的起重能力：该起重机的最大起重量达到1120吨，可以应对各种大型重物的起重需求。2. 高度可调：该起重机具有可伸缩式大臂，可以根据不同的工作需求调节起重高度，适应各种起重作业场景。3. 稳定性好：该起重机采用四点支撑式结构，配备稳定器，能够在起吊重物时提供更好的稳定性和安全性。4. 操控方便：该起重机配备先进的电脑控制系统，操作简便，可以精确控制起重机的移动、起吊等动作。5. 安全可靠：该起重机配备了多项安全装置，如重载保护、倾斜控制、限位保护等，确保起重作业过程中的安全操作。6. 能源节约：该起重机采用先进的液压系统和节能型发动机，能够有效降低能源消耗，达到节约能源的目的。7. 适应性强：该起重机适用于各种起重作业场合，如港口、码头、建筑工地等，能够满足不同场景的起重需求。总之，四川长江LT1120-1起重机具有强大的起重能力、高度可调、稳定性好、操控方便、安全可靠、能源节约和适应性强的优点，是一款性能优良的起重机设备。

Sichuan Changjiang LT1120-1 crane has the following advantages: 1. powerful lifting capacity: the crane's maximum lifting capacity reaches 1120 tons, which can cope with the lifting needs of various large-scale heavy loads. 2. adjustable height: the crane has a retractable jib, which can be adjusted according to the different working needs of the lifting height, and adapted to a variety of lifting scenarios. 3. good stability: the crane adopts a four-point The crane adopts four-point support structure and is equipped with stabilizers, which can provide better stability and safety when lifting heavy objects. 4. easy to operate: the crane is equipped with advanced computer control system, which is easy to operate, and can accurately control the crane's movement, lifting and other actions. 5. safe and reliable: the crane is equipped with a number of safety devices, such as heavy-duty protection, tilt control, limit protection, etc., to ensure the safe operation of lifting operation. 6. energy-saving: the crane has a retractable boom, which can adjust the lifting height according to different work needs. Energy saving: the crane adopts advanced hydraulic system and energy-saving engine, which can effectively reduce energy consumption and achieve the purpose of energy saving.7. Strong adaptability: the crane is suitable for a variety of lifting occasions, such as ports, wharves, construction sites, etc., to meet the lifting needs of different scenarios. In a word, Sichuan Changjiang LT1120-1 crane has the advantages of powerful lifting capacity, adjustable height, good stability, easy to maneuver, safe and reliable, energy saving and strong adaptability, it is a crane equipment with excellent performance.