三一重工STC350C5-1混动版起重机的优点包括：1. 高效节能：采用混合动力系统，将内燃机和电动机结合使用，大幅降低燃油消耗和排放，节省能源并保护环境。2. 强劲动力：配备大功率内燃机和高性能电动机，提供强劲的起重能力和运行速度，能够适应各种复杂的起重工作。3. 操作简便：采用先进的液压系统和电动控制技术，操作方便灵活，提供精确的起重控制，使操作更加安全、高效。4. 安全可靠：配置多种安全装置，如超载保护、倾覆保护等，确保起重过程中的安全可靠性。5. 适应性强：具备自动行驶功能，可在不平整的工地上进行起重作业，同时具备多项伸缩臂和换臂功能，满足不同起重高度和距离的需求。6. 维护方便：采用模块化设计，易于维护和更换部件，降低了维护成本和维修时间。综上所述，三一重工STC350C5-1混动版起重机在节能环保、强劲动力、操作简便、安全可靠、适应性强和维护方便等方面具有一系列优点。

The advantages of Sany STC350C5-1 Hybrid Crane include:1. Energy efficient: adopting hybrid power system, combining the internal combustion engine and electric motor, significantly reducing fuel consumption and emissions, saving energy and protecting the environment.2. Strong power: equipped with a high-power internal combustion engine and a high-performance electric motor, it provides a strong lifting capacity and operating speed, and is able to adapt to a variety of complex lifting jobs.3 . Easy operation: adopting advanced hydraulic system and electric control technology, it is easy and flexible to operate, providing precise lifting control, making the operation safer and more efficient.4. Safe and reliable: equipped with a variety of safety devices, such as overload protection, tipping protection, etc., to ensure safety and reliability during lifting.5. Adaptable: equipped with the automatic traveling function, it can be used for lifting work on uneven construction sites, and at the same time, it is equipped with multiple telescopic jib and jib changing functions to meet the needs of different lifting heights and distances.6. Convenient maintenance: modular design, easy to maintain and replace parts, reducing maintenance costs and repair time. To summarize, Sany Heavy Industry STC350C5-1 hybrid crane has a series of advantages in terms of energy saving and environmental protection, strong power, easy operation, safety and reliability, adaptability and easy maintenance.