沃尔华GNQY-3500起重机的优点有如下几个：1. 高起重能力：沃尔华GNQY-3500起重机的最大起重能力达到3500吨，能够应对大型工程和重量级任务。2. 卓越的稳定性：起重机的主梁采用了双梁箱式结构设计，具有较高的刚度和稳定性，能够有效降低吊物晃动风险。3. 轴承能力强：起重机的回转轴承采用优质轴承，具有很高的承载能力和抗疲劳性，能够满足长时间重载作业的需求。4. 操控性优良：起重机配备先进的电气控制系统和智能化操作界面，操作简便，响应速度快，具有较高的精准度和操控性。5. 安全可靠：起重机配备了完备的安全保护系统，包括过载保护、行程限位、超重报警等功能，能够有效保障作业人员的人身和设备的安全。6. 维护保养便捷：起重机采用模块化设计，易于拆装和维修，同时配备了自动润滑装置，减少了日常维护工作的负担。总之，沃尔华GNQY-3500起重机具有高起重能力、稳定性强、操作便捷、安全可靠等优点，适用于各种大型起重作业场合。

Advantages of Volvo GNQY-3500 crane are as follows:1. High lifting capacity: the maximum lifting capacity of Volvo GNQY-3500 crane reaches 3,500 tons, which is able to cope with large-scale projects and heavyweight tasks.2. Excellent stability: the main beam of the crane adopts the double girder box structure design, which has high stiffness and stability, and effectively reduces the risk of swaying of the lifting object.3. High bearing capacity: the slewing bearings of the crane adopt high-quality bearings, which have high load carrying capacity and fatigue resistance.4. Strong bearing capacity: the crane's slewing bearing adopts high-quality bearings with high bearing capacity and fatigue resistance, which can meet the needs of long-time heavy-duty operation.4. Excellent maneuverability: the crane is equipped with advanced electrical control system and intelligent operation interface, which is easy to operate, with fast response speed, and high precision and maneuverability.5. Safety and reliability: the crane is equipped with complete safety protection system, including overload protection, travel limit position protection, and safety protection system, which can effectively reduce the risk of lifting objects shaken. Including overload protection, travel limit, overweight alarm and other functions, which can effectively protect the personal and equipment safety of the operators.6. Convenient maintenance: the crane adopts modular design, easy to disassemble and repair, and is equipped with automatic lubrication device, which reduces the burden of daily maintenance work. In a word, Volvo GNQY-3500 crane has the advantages of high lifting capacity, strong stability, convenient operation, safety and reliability, etc. It is suitable for various large-scale lifting occasions.