标准号:IS 12606-1989
发布日期:1989/9/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:1.1 This standard lays down the limiting values of static load applied vertically by transport tractors and trailers on ball coupling fitted to the towing vehicles.1.2 This standard applies to transport tractors and trailers for which the maximum authorized weight does not exceed 3.5 tonnes.1.3 This standard does not apply to unbraked trailers and twin-axle trailers.