中联重科ZR400C-3K旋挖钻有以下优点：1. 高效：采用了全新的液压系统和动力传动系统，提高了工作效率。最大钻孔直径为1.8米，最大钻孔深度达到59米，可以满足不同施工需求。2. 稳定性好：采用了全新的升级型液压回转底盘，提高了整机的稳定性和平衡性。同时配备了强劲的动力系统，能够适应不同地质条件下的施工需求。3. 操作简便：采用人性化的设计，操作界面简单易懂，操作方便。配备了自动超负荷保护和自动调速控制系统，确保施工安全和稳定性。4. 全方位施工能力：配备了多种施工工具，如岩土钻具、土钻具以及筒仓钻具等，能够适应多种不同的施工需求。5. 维护方便：采用了简单和易于维护的结构设计，降低了维护成本和维修时间。6. 节能环保：采用了先进的动力系统和液压系统，能够降低能源消耗和碳排放，符合环保要求。7. 可靠性高：采用了优质的材料和工艺，保证了整机的可靠性和耐用性。同时配备了完善的售后服务系统，能够及时解决用户的问题。

Zoomlion ZR400C-3K rotary drill has the following advantages: 1. High efficiency: it adopts a brand new hydraulic system and power transmission system, which improves the working efficiency. The maximum drilling diameter is 1.8 meters, and the maximum drilling depth reaches 59 meters, which can meet different construction requirements.2. Good stability: It adopts a new upgraded hydraulic rotary chassis, which improves the stability and balance of the whole machine. Meanwhile, it is equipped with strong power system, which can adapt to the construction needs under different geological conditions. 3. Easy operation: it adopts humanized design, with simple and easy-to-understand operation interface and convenient operation. Equipped with automatic overload protection and automatic speed control system to ensure construction safety and stability. 4. All-round construction ability: Equipped with a variety of construction tools, such as geotechnical drilling tools, soil drilling tools and silo drilling tools, which can adapt to a variety of different construction needs. 5. Convenient maintenance: Adopting a simple and easy-to-maintain structural design, which can reduce the maintenance cost and repair time. 6. Energy-saving and environment-friendly: Adopting advanced power system and hydraulic system, which can adapt to different construction needs under different geological conditions. 7. The adoption of advanced power system and hydraulic system can reduce energy consumption and carbon emission, in line with the requirements of environmental protection. 7. High reliability: the use of high-quality materials and processes to ensure the reliability and durability of the whole machine. Meanwhile, it is equipped with perfect after-sales service system, which can solve the user's problems in time.