This standard applies to all kinds of leather made of buffalo, buffalo, sheep and pigskin. According to the fiber characteristics of different parts of raw hide and the position of each part on the leather surface, it indicates the division of leather parts.
GB/T 4690-1984 history
1984GB/T 4690-1984 Discrimination of the location of leather
GB/T 4690-1984 Discrimination of the location of leather was changed to QB/T 2800-2006 Differentiation of finished leather parts.