2007TB/T 2812-2007 Repair-in-depot gauge for No. 13A type coupler yoke
1997TB/T 2812.1-1997 13th hook tail frame pin hole length and frame body thickness section repair inspection sample
TB/T 2812.1-1997 13th hook tail frame pin hole length and frame body thickness section repair inspection sample was changed to TB/T 2812-2007 Repair-in-depot gauge for No. 13A type coupler yoke.