中联重科YZK21压路机(jī)的优点包括：1. 功能(néng)强大：中联重科YZK21压路机(jī)具有高效的土壤(rǎng)、砾石、沥青等压实能(néng)力，能(néng)够满足不(bù)同工程的压路需求。2. 易(yì)于操作：该压路机(jī)采用先进的液压系统和电子控制技术，操作简单方(fāng)便，可根据需要进行多种操作模式的切(qiē)换。3. 稳定性高：中联重科YZK21压路机(jī)采用重心低、重量均匀分布的设计，能(néng)够提供稳定的工作状态，提高施工安全性。4. 燃油经济性好：该压路机(jī)采用高效节(jié)能(néng)的发动机(jī)和液压系统，燃油经济性好，能(néng)够降低施工成本。5. 维护方(fāng)便：中联重科YZK21压路机(jī)采用了 modulis-soft 结构化电路设计，易(yì)于维护和保养，减少了停工时间，提高了工作效率。总结起来，中联重科YZK21压路机(jī)具有功能(néng)强大、易(yì)于操作、稳定性高、燃油经济性好和维护方(fāng)便等优点，能(néng)够满足各种工作环境的压路需求。

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.