ISO 17591定义了识别术语，规定了分类方法，并给出了林业用转向节臂原木装载机的部件名称。其目的是建立一种统一的方法来描述这种移动式林业机械的各种配置。

ISO 17591 defines identifying terms, specifies a means of classification and gives a nomenclature of components for the knuckleboom log loader machinery used in forestry. Its aim is to establish a uniform method of describing the various configurations of this type of mobile forest machine.