徐工QY20K5C起重机具有以下优点：1. 大起重能力：QY20K5C起重机的起重能力达到20吨，可以满足大多数起重作业的需求。2. 灵活性强：该起重机配备伸缩式臂架和旋转回转台，可以实现360度全方位旋转和多段折叠伸缩，使起重操作更加灵活和便捷。3. 操作简便：QY20K5C起重机配备先进的液压系统和智能控制系统，操作简单方便，可以快速调整起重动作和角度。4. 安全可靠：起重机配备多重安全装置，如超载保护装置、限位装置等，确保起重操作过程安全可靠。5. 节能环保：QY20K5C起重机采用先进的动力系统和液压系统，具有低耗能、低噪音和低排放的特点，实现了节能环保的目标。6. 质量和耐久性：作为徐工品牌的产品，QY20K5C起重机具有优良的质量和耐久性，可以在各种恶劣的工作环境下长时间使用。

XCMG QY20K5C crane has the following advantages:1. Large lifting capacity: the lifting capacity of QY20K5C crane reaches 20 tons, which can meet the needs of most lifting operations.2. Flexible: the crane is equipped with telescopic boom and rotating slewing platform, which can realize 360-degree all-around rotation and multi-segment folding and retracting, which makes lifting operations more flexible and convenient.3. Easy to operate: QY20K5C crane is equipped with advanced hydraulic system and intelligent control system, easy and convenient to operate, can quickly adjust the lifting action and angle. 4. safe and reliable: the crane is equipped with multiple safety devices, such as overload protection device, limit device, etc., to ensure that lifting operations are safe and reliable. 5. energy-saving and environmentally friendly: the QY20K5C crane is equipped with advanced power system and hydraulic system, which has the advantages of low energy consumption, low noise and low emissions. energy, low noise and low emission, realizing the goal of energy saving and environmental protection.6. Quality and durability: as a product of XCMG brand, QY20K5C crane has excellent quality and durability, and it can be used for a long time in all kinds of harsh working environments.