標準號：IS 9212-1979
發布日期：1979/10/1 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：a) Determines and limits the values of pressures in the compressed-air lines of road vehicles and lines used to ensure pneumatic connections between tractors and trailers, andb) Determines braking efficiency.1.1 It applies to vehicles for international commercial transport with trailers of a total loaded weight greater than 3·5 tonnes-force.1.2 It deals only with compressed-air braking devices with two lines, one service braking line and the other automatic braking line.