中联重科ZTC121V451起重机的优点有：1. 高效性能：该起重机具(jù)备较高的起重效率和(hé)作(zuò)业(yè)能力，能够快速完成各类起重作(zuò)业(yè)任务，提高工作(zuò)效率。2. 稳定可靠：该起重机采用先进的技术和(hé)设计，具(jù)备较好的稳定性和(hé)可靠性，能够在各种恶劣(liè)工作(zuò)环境下正常运行，确保作(zuò)业(yè)安全。3. 灵活机动：该起重机具(jù)备较小的转弯半径和(hé)灵活的工作(zuò)机构，能够适应狭小空间和(hé)复杂工况，实现各种复杂作(zuò)业(yè)要求。4. 操作(zuò)方便：该起重机配备先进的人机工程学控制系统(tǒng)和(hé)操作(zuò)界面，操作(zuò)简单、易学易懂，提高了工作(zuò)人员的操作(zuò)效率和(hé)操作(zuò)安全性。5. 维护便捷：该起重机的维护保养工作(zuò)较为方便，维修时(shí)间较短，能够减少设备的停机时(shí)间，提高作(zuò)业(yè)效率。6. 节能环保：该起重机采用先进的动力系统(tǒng)和(hé)节能技术，能够降低能耗和(hé)排放，符合环保要求，减少对环境的影(yǐng)响。

Advantages of Zoomlion ZTC121V451 crane are: 1. High efficiency performance: the crane has a high lifting efficiency and operating capacity, can quickly complete all kinds of lifting tasks, improve work efficiency. 2. Stable and reliable: the crane adopts the advanced technology and design, with good stability and reliability, can be in a variety of poor working environment normal operation, to ensure operational safety. 3. flexible and mobile: the crane is equipped with a small turning radius and flexible working mechanism to adapt to the narrow space and complex working conditions. 4. Flexible: the crane has a small turning radius and flexible working mechanism, can adapt to the narrow space and complex working conditions, to achieve a variety of complex operational requirements. 4. easy to operate: the crane is equipped with advanced ergonomic control system and operator interface, simple operation, easy to learn and easy to understand, to improve the staff's operational efficiency and operational safety. 5. convenient maintenance: the crane's maintenance Convenient maintenance: the crane's maintenance is more convenient and the maintenance time is shorter, which can reduce the downtime of the equipment and improve the operational efficiency. 6. energy saving and environmental protection: the crane adopts advanced power system and energy saving technology, which can reduce the energy consumption and emissions, comply with the environmental protection requirements, and reduce the impact on the environment.