标准号:IS 12807-1989
发布日期:1990/4/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:1.1 This Indian Standard specifies the essential dimensional characteristics of 40 mm and 50 mm drawbar eyes to permit interchangeability between towing vehicles and trailers equipped with these connections.1.2 These mechanical connections are not inter-changeable with each other.1.3 This standard applies to mechanical connec-tions designed for commercial vehicles and trailers operating on/off highways, the maximum total weight of which is above 3.5 t.