中联重科ZLJ5281JQZ20V起重机的优点有：1. 高起重能力：该起重机具有较高的起重能力，能够满足大部分重型起重工作的需求。2. 稳定性(xìng)好：起重机采(cǎi)用了先进的稳定技术(shù)，能够保证(zhèng)在高空作业时的稳定性(xìng)，提高工作效率和安全性(xìng)。3. 操作简便：起重机配备(bèi)有可调节的控制系统，操作方便，可灵活调整工作状态。4. 耐用性(xìng)强：该起重机采(cǎi)用了高强度钢材和坚固的结构设计，能够经受长时间、高负载的工作环境，具有较强的耐用性(xìng)和寿命。5. 机动性(xìng)好：起重机具备(bèi)较好的机动性(xìng)能，能够适应复杂的工地环境，保证(zhèng)工作的灵活性(xìng)和适应性(xìng)。6. 具备(bèi)安全保护(hù)系统：起重机配备(bèi)有完善的安全保护(hù)系统，包括超载保护(hù)、限位保护(hù)等功能，保证(zhèng)起重作业的安全性(xìng)。7. 技术(shù)水平高：中联重科作为国内领先的工程机械制造商，起重机采(cǎi)用了先进的技术(shù)和制造工艺，保证(zhèng)产品的品质和性(xìng)能。8. 维修(xiū)保养方便：起重机的构造和设计考虑了维修(xiū)保养的需求，便于对设备(bèi)进行维修(xiū)和保养，保证(zhèng)设备(bèi)的正常运行和使用寿命。

The advantages of Zoomlion ZLJ5281JQZ20V crane include:1. High lifting capacity: the crane has high lifting capacity, which can meet the needs of most heavy lifting work.2. Good stability: the crane adopts advanced stabilization technology, which can ensure stability when working at height, and improve the working efficiency and safety.3. Easy operation: the crane is equipped with an adjustable control system, easy to operate, can flexibly adjust the working condition. 4. strong durability: the crane adopts high-strength steel and sturdy structural design, able to withstand long time, high load working environment, with strong durability and life. 5. good mobility: the crane has good mobility, able to adapt to the complex site environment, to ensure the flexibility and adaptability of the work. 6. equipped with safety protection system: the crane is equipped with a complete safety protection system, including overload protection, limit protection and other functions, to ensure the safety of lifting operations. 7. high level of technology: Zoomlion, as a leading construction machinery manufacturer in China, the crane adopts advanced technology and manufacturing process, to ensure the quality and performance of the product. 8. easy maintenance: the construction and design of the crane take into account the need for repair and maintenance. It is convenient to repair and maintain the equipment to ensure the normal operation and service life of the equipment.