This standard specifies the terminology of undefined shape edges and the guidelines for expressing the status of undefined shape edges in technical drawings. It also specifies the scale and size of the graphic symbols used. This standard is applicable to the labeling of undefined shape edges in engineering drawings, lx 45. For the geometric definition of shape, refer to the provisions of 68/T 4458.4 and 68/T 16675.2.
GB/T 19096-2003 history
2003GB/T 19096-2003 Technical drawing--Drawing presentation--Vocabulary and indications for edges of undefined shape