徐工QY70K5D_1起重机的优点包括：1. 高效性能：这款起重机具有较高的起重能力和工作(zuò)速度，能够快速完成各种起重任务。2. 多功能性：它具有多种工作(zuò)模式，如起重、吊装、装卸等，可适应各种施(shī)工场景和需求。3. 灵活性：该起重机采用全液压传动系统，操作(zuò)简便灵活，可以准确控制起重动作(zuò)。4. 安全性：徐工QY70K5D_1起重机配备了多项安全设施(shī)，如超载自动检测、高度限制器等，保障操作(zuò)安全。5. 耐用性：采用了高强度钢材和优质液压元件，具有较强的结构强度和耐用性，能够适应恶劣的施(shī)工环境。6. 维护(hù)便捷：该起重机具有模块化设计和独特的维护(hù)通道，维修保养(yǎng)方便快捷，可以降低(dī)维护(hù)成本和停机时间。需要注意的是，以上优点仅为展示，具体优点还需根据该起重机的详细技术参数和功能进行评估。

The advantages of XCMG QY70K5D_1 crane include:1. High efficiency performance: this crane has high lifting capacity and working speed, which can quickly complete various lifting tasks.2. Multifunctionality: it has multiple working modes, such as lifting, hoisting, loading and unloading, etc., which can be adapted to a wide range of construction scenarios and needs.3. Flexibility: this crane adopts a full hydraulic transmission system, which is easy and flexible to operate and can accurately control the lifting action.4. Safety: XCMG QY70K5D_1 crane is equipped with a number of safety facilities, such as overload automatic detection, height limiter, etc., to protect the operation safety.5. Durability: the use of high-strength steel and high-quality hydraulic components, has a strong structural strength and durability, and can adapt to harsh construction environments.6. Maintenance and convenience: the crane has a modular design and unique maintenance access, maintenance is convenient and quick, which can reduce maintenance costs and downtime. It should be noted that the above advantages are only for demonstration, the specific advantages should be evaluated according to the detailed technical parameters and functions of the crane.