For cylinder diameters,besides two point size,actual size and local actual size,the National Standard of China also specified computing sizes,which included area diameter,perimeter diameter and volume diameter,and global sizes,which included least square diameter,maximum inscribed diameter and minimum circumscribed diameter.
This paper deals with the multichannel rotating joint, from which the design for-mulas are derived. The process of computer-aid design is presented. Some models aremade according to the computing sizes, and the results of their measurements are thusgiven.
For cylinder diameters,besides two point size,actual size and local actual size,the National Standard of China also specified computing sizes,which included area diameter,perimeter diameter and volume diameter,and global sizes,which included least square diameter,maximum inscribed diameter and minimum circumscribed diameter.According to the characteristics of these diameters and new GPS regulations,some corresponding evaluation models of these diameters were built using section measuring m...