标准摘要
[中文适用范围]： 本国际标准规定了根据 ISO 6489-3 设计用于连接到 U 型农用拖拉机牵引杆的农用拖车和牵引机具的挂钩环的尺寸要求。 [外文原描述]： ISO 21244:2008 specifies dimensional requirements for the hitch rings of agricultural trailers and trailed implements designed to be attached to agricultural tractor drawbars according to ISO 6489-3.
英文名称Agricultural equipment — Mechanical connections between towed and towing vehicles — Implement hitch rings and attachment to tractor drawbars