柳工913EG4国四挖掘机的优点有以下几点：1. 减排节能：柳工913EG4国四挖掘机采用了国际先进的国四发动机技术，能够有效降低废气排放量，符合国家的环保要求。同时，该发动机还具有较高的燃烧效率，可以节约能源。2. 性能稳定可靠：柳工913EG4国四挖掘机采用了优质的液压系统和操作系统，具有良好的动力性能和控制能力，能够满足各种作业需求。同时，该挖掘机还经过了严格的耐久性测试，具有较高的可靠性和稳定性。3. 操作便捷舒适：柳工913EG4国四挖掘机配备了人性化设计的操作室，采用了先进的人机工程学技术，操作简便、舒适。同时，操作室还具有良好的噪音隔离性能，能够提供一个较为安静的工作环境。4. 维护保养方便：柳工913EG4国四挖掘机的维护保养点都布置在合理的位置，并且配备了专门的维修通道，方便用户进行日常的保养和维护工作。同时，该挖掘机还采用了一些自动化的维护功能，能够提高维护效率。5. 安全可靠：柳工913EG4国四挖掘机具有完善的安全保护装置，包括起重过载保护、发动机停机保护、防护装置等，能够有效预防事故的发生，保障操作人员的安全。综上所述，柳工913EG4国四挖掘机具有减排节能、性能稳定可靠、操作便捷舒适、维护保养方便和安全可靠等优点。

The advantages of LiuGong 913EG4 national four excavator are as follows: 1. Emission reduction and energy saving: LiuGong 913EG4 national four excavator adopts international advanced national four engine technology, which can effectively reduce the exhaust emissions and meet the national environmental protection requirements. At the same time, the engine also has a high combustion efficiency, which can save energy.2. Stable and reliable performance: LiuGong 913EG4 national four excavator adopts high-quality hydraulic system and operating system, which has good power performance and control ability, and can meet various operational requirements. Meanwhile, the excavator has also passed strict durability test, with high reliability and stability.3. Convenient and comfortable operation: LiuGong 913EG4 national four excavator is equipped with humanized design operation room, which adopts advanced ergonomics technology and is easy and comfortable to operate. At the same time, the operation room also has good noise isolation performance, which can provide a quieter working environment.4. Convenient maintenance: the maintenance points of LiuGong 913EG4 national four excavator are arranged in reasonable positions and equipped with special maintenance channels, which is convenient for users to carry out daily maintenance and repair work. At the same time, the excavator also adopts some automated maintenance functions, which can improve the maintenance efficiency.5. Safe and reliable: LiuGong 913EG4 national four excavator has perfect safety protection devices, including lifting overload protection, engine shutdown protection, guards, etc., which can effectively prevent accidents from occurring and guarantee the safety of operators. To summarize, LiuGong 913EG4 national four excavator has the advantages of emission reduction and energy saving, stable and reliable performance, convenient and comfortable operation, easy maintenance and safety and reliability.