沃尔华GNQY-688起重机具有以下优点：1.高起重能力：该起重机具有较高的(dí)起重能力，可以满足大部分重型起重任务的(dí)需要，最大起重能力可达到688吨。2.灵活性(xìng)好：该起重机设计灵活，可实现360度无死角的(dí)旋转，可以在狭小的(dí)场地内进行起重作业(yè)。3.稳定性(xìng)高：起重机配备了稳定的(dí)脚垫和支腿，可以确保在起重过程中的(dí)稳定性(xìng)，使起重作业(yè)更加安全可靠。4.操作方便：起重机的(dí)操作系统简单易懂，操作人员可以轻松掌握其使用方法，并且具有多种安全保护装置，确保起重作业(yè)的(dí)安全性(xìng)。5.可靠性(xìng)强：该起重机采用了高品质的(dí)配件和材料，具有较高的(dí)可靠性(xìng)和耐久性(xìng)，可以长时间稳定地工作。6.节能环保：起重机采用先进的(dí)节能技术，可以有效限制能源的(dí)消耗，降低运行成本，同时减少对(duì)环境的(dí)污染。综上所述，沃尔华GNQY-688起重机具有高起重能力、灵活性(xìng)好、稳定性(xìng)高、操作方便、可靠性(xìng)强和节能环保等(děng)优点，适用于各种起重作业(yè)场景。

Volvo GNQY-688 crane has the following advantages:1. High lifting capacity: the crane has a high lifting capacity, can meet the needs of most heavy lifting tasks, the maximum lifting capacity can reach 688 tons.2. Flexibility: the crane is designed to be flexible, and can achieve 360-degree rotary without dead angle, so that it can carry out lifting operations in a narrow site.3. High stability: the crane is Equipped with stable feet and legs, it can ensure the stability in the lifting process and make the lifting operation more safe and reliable.4. Convenient operation: the crane's operating system is simple and easy to understand, and the operator can easily master its use, and it has a variety of safety protection devices, which ensures the safety of lifting operations.5. Strong reliability: the crane adopts high-quality fittings and materials, which has a high degree of Reliability and durability, can work stably for a long time.6. Energy-saving and environmental protection: the crane adopts advanced energy-saving technology, which can effectively limit the consumption of energy and reduce the operating costs, while reducing the pollution of the environment. To summarize, Walhwa GNQY-688 cranes have the advantages of high lifting capacity, good flexibility, high stability, easy operation, high reliability and energy saving and environmental protection, which are suitable for all kinds of lifting operation scenarios.