中联重科ZLJ5151JQZ12H起重机的优点有：1. 强大的起重能力：ZLJ5151JQZ12H起重机拥有高达12吨的起重能力，能够应对各种较大的起重任务。2. 高度和幅度的可调性：起重机可进行360度无级回转，同时具备最大伸臂长度和幅度，能够灵活适应不同的工作环境和要求。3. 稳定性和安全性：起重机采用先进的起重控制系统，具备稳定的工作性能和精准的动作控制，能够保证作业过程的安全和顺利进行。4. 高效的工作效率：起重机配备有强大的动力系统和灵活的操作控制系统，能够高效地完成各种起重作业，提升工作效率和生产能力。5. 便捷的维护和保养：起重机采用模块化设计，各个部件可以快速拆装和更换，便于维护和保养，减少停工时间和维修成本。6. 节能环保：起重机采用先进的液压系统和动力装置，具备较高的能源利用效率和低排放特性，符合节能环保的要求。总的来说，中联重科ZLJ5151JQZ12H起重机具有高性能、高效率、高安全性等优点，适用于各种起重作业需求。

The advantages of Zoomlion ZLJ5151JQZ12H crane include: 1. powerful lifting capacity: ZLJ5151JQZ12H crane has a lifting capacity of up to 12 tons, which is able to cope with a variety of larger lifting tasks. 2. height and amplitude adjustability: the crane can carry out 360-degree stepless slewing, and at the same time has the maximum reach and amplitude, which is able to flexibly adapt to the different working Stability and safety: the crane adopts advanced lifting control system, with stable working performance and precise movement control, which can ensure the safety and smooth operation of the work process. 4. Efficient working efficiency: the crane is equipped with powerful power system and flexible operation control system, which can efficiently complete all kinds of lifting operations and improve the working efficiency and production capacity. 5. Convenient maintenance and repair: the crane adopts modular system, which is easy to maintain and repair. 6. Maintenance and repair: the crane adopts modular design, each component can be quickly disassembled and replaced, easy to maintain and repair, reduce downtime and maintenance costs. 6. energy saving and environmental protection: the crane adopts advanced hydraulic system and power unit, with high energy efficiency and low emissions, in line with the requirements of energy saving and environmental protection. Overall, Zoomlion ZLJ5151JQZ12H crane has the advantages of high performance, high efficiency and high safety, which is suitable for a variety of lifting operation needs.