三一重工STC250起重机具有以下优点：1. 强大的起重能力：STC250起重机的最大起重能力为25吨，可以应对各种起重任务，包括道路修建、桥梁建设、工地搬运等。2. 灵活性强：该起重机有两种工作模式可选择，分别为公路工作模式和狭小工地工作模式，适应不同的工作场景需求。3. 操控简单：STC250起重机采用先进的液压系统和电子控制技术，操控简便，起重平稳可靠。4. 便于运输和快速组装：STC250起重机采用结构紧凑的设计，可以方便地进行运输和组装，节省时间和成本。5. 安全性高：起重机配备了多重安全保护装置，包括限位开关、超载保护等，确保起重过程安全可靠。6. 保养维护简单：STC250起重机采用易于维护的设计，保养和维护简单方便，降低了使用成本。综上所述，三一重工STC250起重机具有起重能力强大、灵活性强、操控简单、便于运输和快速组装、安全性高以及保养维护简单等优点。

Sany STC250 crane has the following advantages: 1. strong lifting capacity: STC250 crane's maximum lifting capacity of 25 tons, can cope with a variety of lifting tasks, including road construction, bridge construction, site handling, etc. 2. flexible: the crane has two working modes to choose from, respectively, highway working mode and narrow site working mode, to adapt to the different work scenarios Simple manipulation: STC250 crane adopts advanced hydraulic system and electronic control technology, easy to manipulate, smooth and reliable lifting.4. Easy transportation and quick assembly: STC250 crane adopts compact design, which can be easily transported and assembled, saving time and cost.5. High safety: the crane is equipped with multiple safety protection devices, including limit switch, overload protection, etc., to ensure that the lifting process is safe and reliable.6. Simple maintenance: STC250 crane adopts an easy-to-maintain design, which makes maintenance and upkeep simple and convenient, and reduces the cost of use. In summary, Sany STC250 crane has the advantages of powerful lifting capacity, high flexibility, simple control, easy transportation and quick assembly, high safety and simple maintenance.