中联重科YZK21压路机(jī)的(dí)优点包括：1. 功能强大：中联重科YZK21压路机(jī)具有高效的(dí)土壤、砾石、沥青等压实(shí)能力，能够满足不同工(gōng)程的(dí)压路需求。2. 易于操作：该压路机(jī)采用先进的(dí)液压系统和电子控制技术，操作简单方便，可根据需要进行多种操作模式的(dí)切换。3. 稳定性(xìng)高：中联重科YZK21压路机(jī)采用重心低、重量均匀分布的(dí)设计，能够提供稳定的(dí)工(gōng)作状态，提高施工(gōng)安全性(xìng)。4. 燃油经济性(xìng)好：该压路机(jī)采用高效节能的(dí)发动机(jī)和液压系统，燃油经济性(xìng)好，能够降低施工(gōng)成本。5. 维护(hù)方便：中联重科YZK21压路机(jī)采用了 modulis-soft 结构化电路设计，易于维护(hù)和保养，减少了停工(gōng)时间，提高了工(gōng)作效率。总结起来，中联重科YZK21压路机(jī)具有功能强大、易于操作、稳定性(xìng)高、燃油经济性(xìng)好和维护(hù)方便等优点，能够满足各种工(gōng)作环境的(dí)压路需求。

The advantages of Zoomlion YZK21 roller include:1. Powerful function: the Zoomlion YZK21 roller has efficient soil, gravel, asphalt and other compaction capacity, which can meet the compaction needs of different projects.2. Easy to operate: this roller adopts advanced hydraulic system and electronic control technology, which makes it easy and convenient to operate, and can be switched to multiple operation modes as needed.3. High stability: Zoomlion YZK21 roller adopts the design of low center of gravity and even weight distribution, which can provide stable working condition and improve the construction safety. 4. Good fuel economy: This roller adopts energy efficient engine and hydraulic system, which has good fuel economy and can reduce the construction cost. 5. Easy maintenance: Zoomlion YZK21 roller adopts modulis-soft structured circuit design, which is easy to maintain and service, reduces downtime and improves work efficiency. To summarize, Zoomlion YZK21 roller has the advantages of powerful function, easy operation, high stability, good fuel economy and convenient maintenance, which can meet the road roller needs in various working environments.