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徐工QY50K5D-I起重機的優點包括：1. 高性能：該起重機具有50噸的額定起重能力，可以應對大部分的建筑和工程項目需求。2. 靈活性：起重機配備了多種工作組合、多種操作模式和多種工作條件應對能力，可以適應不同的施工環境和需求。3. 高效性：起重機配備了高效的液壓系統和動力傳動系統，能夠在短時間內實現高效的起重操作。4. 安全性：起重機配備了多種安全設備和系統，包括重載限制器、高度限位器、風速傳感器等，以確保操作的安全。5. 舒適性：起重機的駕駛室配置了空調、座椅調節、娛樂系統等設備，提供了舒適的操作環境。6. 省能環保：起重機采用了先進的油路配置，具有低油耗、低噪音和低排放的特點，符合節能環保要求。7. 便于維護：起重機的關鍵部件采用國際知名品牌，易于采購和更換，同時提供了完善的售后服務和維護指導。

The advantages of XCMG QY50K5D-I crane include: 1. High performance: the crane has a rated lifting capacity of 50 tons, which can cope with most of the needs of construction and engineering projects. 2. Flexibility: the crane is equipped with a variety of work combinations, multiple operating modes and multiple work conditions to cope with different construction environments and needs. 3. High efficiency: the crane is equipped with a highly efficient hydraulic system and power transmission system, which can realize efficient lifting operation in a short time.4. Safety: the crane is equipped with a variety of safety equipments and systems, including heavy load limiter, height limiter, wind speed sensor, etc. to ensure safe operation.5. Comfort: the crane's cab is equipped with air-conditioning, seat adjusting, entertainment system and other equipments, which provide a comfortable operating environment.6. Energy saving and environmental protection: The crane adopts advanced oil circuit configuration, featuring low fuel consumption, low noise and low emission, which meets the requirements of energy saving and environmental protection.7. Convenient Maintenance: The key components of the crane adopt international famous brands, which are easy to purchase and replace, and meanwhile, it provides perfect after-sales service and maintenance guidance.