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1. QY20C起重機采用優質材料和先進技術制造，具有良好的品質和可靠性。2. 起重機具有較大的起重能力，最大起重量可達到20噸，能夠應對一般工程項目的各種起重需求。3. 采用伸縮式臂架設計，可以根據實際工作需求進行調整，靈活性較高。4. 配備了先進的液壓系統，具有穩定的工作性能和操作控制性能。5. 駕駛室設計人性化，操作簡單，提高了操作員的工作效率和安全性。6. 可以適應各種復雜的工作環境，如建筑工地、碼頭、倉庫等。7. 起重機具有較高的移動性，可以快速到達工作現場，并能進行360度旋轉。8. 采用了各種安全設備，如重載報警器、平衡裝置等，有效保證了工作安全。9. 維護保養方便，經濟實用，降低了使用成本。總的來說，三一重工QY20C起重機具有良好的質量和可靠性，高起重能力，靈活性強，適應性廣，安全性高，操作方便等優點。

1. QY20C crane is made of high quality materials and advanced technology, with good quality and reliability. 2. The crane has large lifting capacity, the maximum lifting capacity can reach 20 tons, which can cope with all kinds of lifting needs in general projects. 3. It adopts telescopic boom design, which can be adjusted according to the actual working needs, with high flexibility. 4. It is equipped with advanced hydraulic system, with stable working performance and operation control performance. 5. The cab design is user-friendly and simple to operate. 6. It can adapt to various complicated working environments, such as construction sites, docks, warehouses, etc. 6. stable working performance and operation control performance.5. The cab design is humanized and simple to operate, which improves the efficiency and safety of the operator.6. It can adapt to various complex working environments, such as construction sites, docks, warehouses, etc.7. The crane has high mobility and can reach the work site quickly and rotate 360 degrees.8. It adopts a variety of safety equipments, such as heavy load alarm, balancing device, etc., which effectively ensure the safety of the crane. and balancing device, etc., which effectively guarantee the work safety. 9. Easy maintenance, economical and practical, which reduces the cost of use. Overall, Sany QY20C crane has the advantages of good quality and reliability, high lifting capacity, flexibility, wide adaptability, high safety and easy operation.