论文部分内容阅读
分析介绍了新GB/T131—93中与旧GB 131—83的主要差别,讨论了旧GB中的表面粗糙度代号在新GB中新的含义;新GB对间距参数、支承长度率在代号中新的注法;增加了波纹度等新的标注规定。
The main differences between the new GB / T131-93 and the old GB 131-83 are introduced, the new meanings of the surface roughness codes in the old GB in the new GB are discussed, the new GB pair spacing parameters and the support length rate are given in the code New annotation; Added new annotation requirements such as waviness.