利勃海尔LTM1250-5.1起重机具有以下优点：1. 高承载能力：LTM1250-5.1起重机最大起重能力达到250吨，能够满足各种大型起重任务的需求。2. 长达70米的伸缩臂：起重机配备了70米的伸缩臂，能够实现更广泛的工作范围和更高的灵活性。3. 多种工作模式：起重机具有多种工作模式，如全伸、半伸和全收，以适应不同的工作环境和工作需求。4. 先进的安全系统：起重机配备了先进的安全系统，包括动态防碰撞系统、超载保护系统和限位器等，保障操作人员和周围环境的安全。5. 高度可调的驾驶室：驾驶室可在高度范围内进行调整，以提供最佳的视野和操作舒适性。6. 方便的移动性能：起重机具有良好的移动性能，可以快速、稳定地移动到工作现场。7. 环保节能：起重机采用了先进的动力系统和排放控制技术，以降低能耗和排放，达到环保和节能的要求。总之，利勃海尔LTM1250-5.1起重机具有强大的承载能力、灵活的工作范围、先进的安全系统和移动性能，是一款高效、安全、可靠的起重设备。

Liebherr LTM1250-5.1 crane has the following advantages:1. High load capacity: LTM1250-5.1 crane has a maximum lifting capacity of 250 tons, which is able to meet the needs of various large-scale lifting tasks.2. Telescopic boom up to 70 meters: The crane is equipped with a 70-meter telescopic boom, which enables a wider working range and higher flexibility.3. Multiple working modes : The crane features multiple working modes, such as full extension, half extension and full retract, to adapt to different working environments and work requirements. 4. Advanced safety systems: The crane is equipped with advanced safety systems, including dynamic collision avoidance system, overload protection system and limiters, to safeguard the safety of the operator and the surrounding environment. 5. Height-adjustable cabs: The cabs can be adjusted in a range of heights to provide the optimal visibility and operating comfort.6. Convenient mobility performance: the crane has good mobility performance and can be moved to the work site quickly and stably.7. Environmental protection and energy saving: the crane adopts advanced power system and emission control technology to reduce energy consumption and emission to meet the requirements of environmental protection and energy saving. All in all, Liebherr LTM1250-5.1 crane is an efficient, safe and reliable lifting equipment with strong load capacity, flexible working range, advanced safety system and mobility performance.