利勃海尔LRT1090-2.1起重机具有以下优点：1. 强大的起重能力：LRT1090-2.1起重机具有90吨的最大起重能力，能够轻松应对各种起重任务。2. 高效的工作性能：该起重机采用了先进的液压系统和起重技术，能够快速、准确地完成各种起重操作。3. 灵活的移动性能：LRT1090-2.1起重机配备了全地形四轮驱动系统和四轮转向系统，能够在不同地形和狭窄空间中灵活移动，提升工作效率。4. 安全可靠：该起重机配备了多项安全保护装置，如超载保护系统、倾覆保护系统等，能够确保起重过程中的安全性。5. 操作简便：LRT1090-2.1起重机配备了人性化的操作界面和智能化控制系统，操作简便易懂，降低了操作难度和风险。6. 节能环保：该起重机采用了节能技术和排放控制技术，能够降低能耗和环境污染，符合绿色可持续发展的要求。总的来说，利勃海尔LRT1090-2.1起重机具有强大的起重能力、高效的工作性能、灵活的移动性能、安全可靠的特点，是一款高性能的起重机。

Liebherr LRT1090-2.1 crane has the following advantages:1. Powerful lifting capacity: LRT1090-2.1 crane has a maximum lifting capacity of 90 tons, which can easily cope with a variety of lifting tasks.2. Efficient working performance: The crane adopts advanced hydraulic system and lifting technology, which can quickly and accurately complete a variety of lifting operations.3. Flexible movement Performance: LRT1090-2.1 crane is equipped with all-terrain four-wheel drive system and four-wheel steering system, which is able to move flexibly in different terrains and narrow spaces, and improve the working efficiency.4. Safe and reliable: The crane is equipped with a number of safety protection devices, such as overload protection system, tipping protection system and so on, which ensures the safety of the lifting process.5. Easy operation: LRT1090-2.1 crane is equipped with user-friendly hydraulic system and lifting technology. 2.1 crane is equipped with humanized operator interface and intelligent control system, easy to understand the operation, reducing the difficulty and risk of operation. 6. energy saving and environmental protection: the crane adopts energy-saving technology and emission control technology, which can reduce energy consumption and environmental pollution, in line with the requirements of green and sustainable development. Overall, Liebherr LRT1090-2.1 crane is characterized by powerful lifting capacity, efficient working performance, flexible mobility, safety and reliability.