中联重科ZTC251V451起重机的(dí)优点有：1.高效(xiào)能：配备了先(xiān)进的(dí)智能控制系统，能够更加精确地控制起重机的(dí)动作，提高作业效(xiào)率。2.多功能：起重机具备多种工作模式，可以适应不同的(dí)工作环境和(hé)作业需求。例如，可以进行高空作业、抵近作业、清洁作业等。3.安全性高：起重机采用了多种安全措施，如过载(zǎi)保护、限位保护等，能够保证操作人(rén)员和(hé)现场人(rén)员的(dí)安全。4.灵活性强：起重机具备全方位的(dí)旋转能力和(hé)多段伸缩臂，可以在狭小空间内进行作业，提高作业的(dí)灵活性和(hé)效(xiào)率。5.节能环保：起重机采用了先(xiān)进的(dí)液压系统和(hé)节能技术，能够降低能耗，减少环境污染。6.维护方便(biàn)：起重机采用模块化设计，维护和(hé)维修更加快捷方便(biàn)，降低了维护成本和(hé)停工时(shí)间。

The advantages of Zoomlion ZTC251V451 crane include:1. High performance: equipped with advanced intelligent control system, it can control the crane's movements more precisely and improve the operational efficiency.2. Multi-function: the crane has multiple working modes, which can adapt to different working environments and operational needs. For example, it can carry out overhead work, close work, cleaning work, etc.3. High safety: the crane adopts a variety of safety measures, such as overload protection, limit protection, etc., which can ensure the safety of the operator and the site personnel.4. Flexibility: the crane has a full range of rotating ability and multi-segment telescopic boom, which can work in a narrow space, improve the flexibility of the operation and efficiency.5. Energy-saving and environmental protection Crane adopts advanced hydraulic system and energy-saving technology, which can reduce energy consumption and environmental pollution.6. Convenient maintenance: Crane adopts modular design, which makes maintenance and repair faster and more convenient and reduces maintenance cost and downtime.