三一重工SY5540THB 660C-9泵车具有以下优点：1. 高效节能：采用先进的液压系统和发动机，并配备智能控制系统，能够实现高效稳定的泵送操作，并降低能源消耗。2. 稳定性好：具备高强度的承重底盘和稳定器，能够在不平坦的地面上保持稳定，并保证泵送作业的安全性和准确性。3. 泵送能力强：具备大功率发动机和大容量的输送泵系统，能够快速高效地完成大量混凝土的泵送作业。4. 操作便捷：配备智能化的液压控制系统和遥控器，操作简单方便，并能够实现远程操作，提高作业效率。5. 维护保养简单：采用模块化设计，易于拆卸和更换零部件，降低了维护保养的难度和成本。6. 安全性高：具备多重安全保护装置，如防倾覆系统、行驶过载保护系统等，保障泵送作业的安全性。7. 适应性强：可根据不同的工地需求进行调整和组合，适用于不同类型和规模的建筑工程。总之，三一重工SY5540THB 660C-9泵车凭借其高效、稳定、易操作、安全等特点，成为混凝土泵送作业的理想选择。

Sany SY5540THB 660C-9 pump truck has the following advantages: 1. high efficiency and energy saving: with advanced hydraulic system and engine, and equipped with intelligent control system, it can realize high efficiency and stable pumping operation, and reduce the energy consumption. 2. good stability: with high-strength load-bearing chassis and stabilizer, it can maintain stability on uneven ground, and ensure the safety and accuracy of pumping operation. 3. strong pumping capacity: with high-power engine and large-capacity pump system, it can quickly and efficiently complete the pumping operation of large amount of concrete. 4. convenient operation: equipped with intelligent hydraulic control system and remote control. Strong pumping capacity: with a high-power engine and large-capacity pump system, it can quickly and efficiently complete the pumping of large quantities of concrete. 4. Convenient operation: equipped with intelligent hydraulic control system and remote control, it is easy and convenient to operate, and can realize remote operation to improve the operational efficiency. 5. Simple maintenance: it adopts a modularized design, which makes it easy to dismantle and replace the parts and components, and reduces the difficulty and cost of maintenance. 6. High safety: with multiple safety protection devices, such as anti-tipping system, traveling overload protection system, etc., it guarantees the safety of pumping operation. 7. Strong adaptability: it can be adjusted and combined according to the needs of different construction sites, and it is suitable for different types and scales of construction projects. 8. All in all, Sany SY5540THB 660C-9 pump truck has become an ideal choice for concrete pumping operation by virtue of its high efficiency, stability, easy operation and safety.