3系列挖掘机：尺寸与应用指南 3 Series Excavators: Size and Applicati…

20吨级：适合中小型施工项目，操作灵活，运输方便。20-ton class: Suitable for medium to small construction projects, offering flexible operation and easy transportation.35吨级：适合大型施工项目，具有更强的挖掘和起重能力。