徐工(gōng)QY70KD起重机有(yǒu)以下优点：1. 高承载(zǎi)能力：徐工(gōng)QY70KD起重机具有(yǒu)70吨的最大起重能力，可以满足大部分起重作(zuò)业的需求。2. 灵活性强：该起重机的转台和支腿具有(yǒu)360度旋转能力，可以实现全方位的起重作(zuò)业，适应各种工(gōng)况和使用环境。3. 操作(zuò)简便：徐工(gōng)QY70KD起重机采用新一代液压变量技术，操作(zuò)更加简单、灵活，能够精确控制起重机的动作(zuò)。4. 安全可靠：该起重机配备了多种安全装置，包括过载(zǎi)保(bǎo)护、防倾翻装置等，确保(bǎo)起重作(zuò)业的安全。5. 能效高：徐工(gōng)QY70KD起重机采用先进的液压系统和电子控制系统，能有(yǒu)效提高能效，减少能源消耗。6. 维护便捷：该起重机的零部件采用模块化设计，易于维修和更换，降低了维护成本。总的来说，徐工(gōng)QY70KD起重机具有(yǒu)承载(zǎi)能力强、灵活性高、操作(zuò)简便、安全可靠、能效高以及维护便捷的优点，适用于各种起重作(zuò)业需求。

XCMG QY70KD crane has the following advantages: 1. high load capacity: XCMG QY70KD crane has a maximum lifting capacity of 70 tons, which can meet most of the lifting operations. 2. flexible: the crane's turntable and outriggers have a 360-degree rotating capacity, which can realize all-around lifting operations and adapt to a variety of working conditions and use of the environment. 3. easy to operate: XCMG QY70KD crane adopts a new generation of hydraulic variable technology, the operation is more simple, flexible, and can accurately control the movement of the crane. 4. safe and reliable: the crane is equipped with a variety of safety devices, including overload protection, anti-tipping device, etc., to ensure the safety of lifting operations. 5. high energy-efficiency: XCMG QY70KD crane adopts an advanced hydraulic system and electronic control system, which effectively improves the energy efficiency and reduces energy consumption. 6. and reduce energy consumption.6. Convenient maintenance: the crane's parts adopt modular design, which is easy to repair and replace and reduces the maintenance cost. Overall, XCMG QY70KD crane has the advantages of strong carrying capacity, high flexibility, easy operation, safety and reliability, high energy efficiency and convenient maintenance, which is suitable for all kinds of lifting operations.