中联重科ZTC121V451起重机的优点有：1. 高效(xiào)性能：该(gāi)起重机具备较高的起重效(xiào)率和作(zuò)业能力，能够快速完(wán)成各类起重作(zuò)业任务，提高工(gōng)作(zuò)效(xiào)率。2. 稳定可靠：该(gāi)起重机采用先进的技术和设(shè)计，具备较好的稳定性和可靠性，能够在各种恶劣工(gōng)作(zuò)环境下正常运行，确保作(zuò)业安全。3. 灵活机动：该(gāi)起重机具备较小的转弯半径和灵活的工(gōng)作(zuò)机构，能够适应狭小空间和复杂工(gōng)况，实现各种复杂作(zuò)业要求。4. 操作(zuò)方便：该(gāi)起重机配备先进的人机工(gōng)程学控制系统和操作(zuò)界面，操作(zuò)简单、易学易懂，提高了工(gōng)作(zuò)人员的操作(zuò)效(xiào)率和操作(zuò)安全性。5. 维护便捷：该(gāi)起重机的维护保养工(gōng)作(zuò)较为方便，维修时间较短，能够减少(shǎo)设(shè)备的停机时间，提高作(zuò)业效(xiào)率。6. 节能环保：该(gāi)起重机采用先进的动力系统和节能技术，能够降低能耗和排放，符合环保要求，减少(shǎo)对环境的影响。

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.