This standard stipulates the shape, size and technical requirements of the No. 13 hook-tail stick's upper and lower body internal gear inspection templates (hereinafter referred to as the stick internal gear templates). This standard is applicable to the inspection sample of the inner dimensions of the upper and lower frames of the new No. 13 hook tail rod.
1996TB/T 2604.3-1996 Inspection sample of the upper and lower frames of the No. 13 hook tail frame
TB/T 2604.3-1996 Inspection sample of the upper and lower frames of the No. 13 hook tail frame was changed to TB/T 2604-2007 Gauge for No. 13A type coupler yoke.