Designed rationally with lubricating grease used in the advanced sliding bearings of the pulleys, the machinery occupies a certain position in the early history of machinery in China.

• 它们年代久远，结构设计成熟，其中滑车采用了先进的滑动轴承结构和润滑剂，在中国早期机械史上占有一定的地位。