四川长江QYT12起重机的优点如下：1. 大起重量：QYT12起重机的最大起重量达到12吨，能够满足大部分中小型项目的起重需求。2. 高工作效率：起重机采用液压操作系统，可以实现平稳、高效的起重操作，提高工作效率。3. 灵活性强：起重机具有360度旋转能力，可以在狭小的工地环境中灵活操作，提高工作的灵活性。4. 稳定性高：起重机设计采用稳定的脚架结构和平衡装置，能够保证起重过程的稳定，提高安全性。5. 操作简便：起重机采用电脑控制系统和液晶显示屏，操作简单方便，降低了操作人员的学习成本。6. 质量可靠：四川长江是一家有着多年起重机制造经验的企业，其产品质量可靠，有完善的售后服务体系。7. 价格优势：相比其他品牌的起重机，四川长江QYT12起重机价格较为优惠，具有一定的竞争力。综上所述，四川长江QYT12起重机具有大起重量、高工作效率、灵活性强、稳定性高、操作简便、质量可靠和价格优势等优点，适用于各种中小型项目的起重需求。

The advantages of Sichuan Changjiang QYT12 crane are as follows:1. Large lifting capacity: the maximum lifting capacity of QYT12 crane reaches 12 tons, which can meet the lifting needs of most small and medium-sized projects.2. High working efficiency: the crane adopts hydraulic operating system, which can realize smooth and efficient lifting operation and improve the working efficiency.3. Flexible: the crane has a 360-degree rotating capacity, which can be flexibly operated in the narrow site environment, improve the flexibility of work. 4. high stability: the crane is designed with stable tripod structure and balancing device, which can ensure the stability of the lifting process and improve safety. 5. easy operation: the crane adopts a computerized control system and LCD display, which makes the operation simple and convenient, and reduces the cost of learning for the operator. 6. reliable quality: sichuan changjiang is a company with many years of Crane manufacturing experience, the quality of its products is reliable, there is a perfect after-sales service system. 7. price advantage: compared with other brands of cranes, Sichuan Changjiang QYT12 crane price is more favorable, has a certain degree of competitiveness. In summary, Sichuan Changjiang QYT12 crane has the advantages of large lifting capacity, high efficiency, flexibility, high stability, easy to operate, reliable quality and price advantage, applicable to a variety of small and medium-sized projects lifting needs.