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柳工956EHDG4國四挖掘機的優點包括：1. 強大耐用的發動機：采用優質的國內知名品牌發動機，功率強勁，扭矩大，能夠適應各種工況和作業要求。2. 高效的工作性能：具有獨特的液力變矩器和行走系統，能夠提供強大的牽引力和切割力，快速穩定地進行各種作業。3. 全新的液壓系統：采用先進的液壓技術，具有高效節能、穩定可靠的特點，提供更高的工作效率和精確的操控性能。4. 寬敞舒適的駕駛室：駕駛室設計人性化，視野開闊，座椅舒適，噪音低，空調系統高效，使操作員能夠在長時間作業中得到良好的工作體驗。5. 安全可靠的結構設計：機身結構堅固穩定，具有良好的抗沖擊和承載能力，操控系統靈活可靠，能夠在各種工況下保證操作員的安全。6. 易于維護和維修：開放式的維護空間和易拆卸的部件設計，方便操作員進行日常維護和維修，縮短停機時間，提高作業效率。7. 多種配件和配置選擇：可根據作業需求選擇不同的工作裝置、斗容和其他附件，以適應不同的施工環境和作業要求。綜上所述，柳工956EHDG4國四挖掘機在發動機、工作性能、液壓系統、駕駛室、安全性、維護性和配置選擇等方面都具備優越的特點，能夠滿足各種挖掘作業的需求。

The advantages of LiuGong 956EHDG4 national four excavator include:1. Powerful and durable engine: adopting high-quality domestic famous brand engine, it has strong power and high torque, which can adapt to a variety of working conditions and operational requirements.2. Efficient working performance: with unique torque converter and travel system, it can provide strong traction and cutting force, and carry out a variety of operations quickly and stably.3. New hydraulic System: Adopting advanced hydraulic technology with high efficiency and energy-saving, stable and reliable features, it provides higher working efficiency and precise maneuvering performance. 4. Spacious and comfortable cab: With humanized cab design, wide field of vision, comfortable seats, low noise, and efficient air-conditioning system, it enables the operator to have a good working experience during long-time operation. 5. Safe and reliable structural design: With solid and stable structure of the body, it has good impact and shock resistance, and is able to work quickly and stably. 6. The body structure is strong and stable, with good impact resistance and loading capacity, and the control system is flexible and reliable, which can ensure the safety of the operator under various working conditions. 6. Easy maintenance and repair: The open maintenance space and easy-to-dismantle parts design are convenient for the operator to carry out daily maintenance and repair, shorten the downtime and improve the working efficiency. 7. Various accessories and configurations to choose from: You can choose different working devices, bucket capacity and other accessories to meet different construction requirements. 8. Other accessories can be selected according to the operation requirements, so as to adapt to different construction environments and operation requirements. To summarize, LiuGong 956EHDG4 national four excavator has superior features in engine, working performance, hydraulic system, cab, safety, maintenance and configuration options, etc., which can meet the needs of various excavation operations.