利勃海尔LTM1400-7.1起重机具有以下优点：1. 高承载能力：利勃海尔LTM1400-7.1起重机承载能力高达400吨，能满足大部分工程项目的起重需求。2. 长臂长度：起重机配备了领先行业的63米长臂，可实现更大范围的起重作业。3. 稳定性高：利勃海尔LTM1400-7.1起重机配备了全球首款单个电机驱动的8轮K眼字型支腿，支腿部分采用新一代设计，使起重机能够在各种复杂的工况下保持稳定。4. 可靠性强：起重机采用了高强度钢材和优质的液压系统，具有较高的可靠性和抗风性能。5. 便于移动：起重机具有自驱动功能，可以快速地从一个工地移动到另一个工地，提高工作效率。6. 操作方便：起重机配备了全液晶显示屏的智能化操作系统，使操作更加方便和精确。7. 多功能性：利勃海尔LTM1400-7.1起重机可以配备各种附属设备和配件，如夹具、吊具等，可以进行不同类型的起重作业。总之，利勃海尔LTM1400-7.1起重机具有高承载能力、长臂长度、稳定性高、可靠性强、便于移动、操作方便和多功能性等优点，适用于各类起重作业。

Liebherr LTM1400-7.1 cranes have the following advantages: 1. high load capacity: Liebherr LTM1400-7.1 cranes have a load capacity of up to 400 tons, which can meet the lifting needs of most projects. 2. long boom length: the cranes are equipped with an industry-leading 63-meter long boom, which enables a wider range of lifting operations. 3. high stability: the Liebherr LTM1400-7.1 crane is equipped with the world's first single motor-driven 8-wheeled K-eye outriggers, and the outrigger part adopts a new generation design, which enables the crane to maintain stability under various complicated working conditions. 4. High reliability: the crane adopts high-strength steel and high-quality hydraulic system, which provides high reliability and wind resistance. 5. Convenient to move: the crane is equipped with a self-driven function, which allows it to be quickly move from one site to another to improve work efficiency.6. Easy to operate: the crane is equipped with an intelligent operating system with a full LCD display, which makes the operation more convenient and precise.7. Multifunctionality: Liebherr LTM1400-7.1 cranes can be equipped with a variety of ancillary equipment and accessories, such as clamps, spreaders and so on, which allow them to carry out different types of lifting operations. In a word, Liebherr LTM1400-7.1 crane has the advantages of high load capacity, long boom length, high stability, high reliability, easy to move, easy to operate and multifunctionality, which is suitable for all kinds of lifting operations.