Home / Standards / GB/T 4781-1984 GB/T 4781-1984 Abolished Mechanical connection between towing vehicle and full trailers for interchangeability 牵引车与全挂车的机械连接装置互换性 Standard Type GBT ICS 43.040.50 CCS T72 Status 废止 Issue Date 1984-11-08 Implementation 1985-10-01 Responsible Dept 工业和信息化部 Drafting Unit N/A