[国外标准] SAE AMS 5569A-2001 Steel, Corrosion and Heat Resistant, Seamless and Welded Hydraulic Tubing 19Cr -
[机械行业标准] JB/T 5569-2019 精密滚齿机 精度检验
[化工行业标准] HG/T 5569-2019 农药用硫磺粉