《墨子·52章 备城门》
藉车的柱子长一丈七尺，埋于地下部分长四尺；车座长三丈至三丈五尺，马颊长二尺八寸，根据所测试的籍车的力度而制作车困，车座四分之三在地面上。
藉车之柱长丈七尺，其貍者四尺；夫长三丈以上至三丈五尺，马颊长二尺八寸，试藉车之力而为之困，失四分之三在上。
The length of the beam of the chariot is 17 feet, and 4 feet of it are buried underground; the length of the chassis is 30 to 35 feet; the length of the cheek is 2 feet 8 inches; the thick rope is made in accordance with the strength of the horse-drawn chariots tested. Three-quarters of the chassis is on the ground.