挖掘机420 vs 450：哪款最适合您的工程项目？ Excavator 420 vs 450: Wh…

挖掘机420：通常配备小功率发动机，适用于中小型工程项目，具有较高的燃油效率。Excavator 420: Typically equipped with a smaller engine, suitable for medium to small engineering projects, with higher fuel efficiency.挖掘机450：配备大功率发动机，适用于大型工程项目和重载工作，…