In the international standard classification, gold sem involves: Linear and angular measurements.
American Society for Testing and Materials (ASTM), gold sem
ASTM F1372-93(1999) Standard Test Method for Scanning Electron Microscope (SEM) Analysis of Metallic Surface Condition for Gas Distribution System Components
ASTM F1372-93(2020) Standard Test Method for Scanning Electron Microscope (SEM) Analysis of Metallic Surface Condition for Gas Distribution System Components
ASTM F1372-93(2005) Standard Test Method for Scanning Electron Microscope (SEM) Analysis of Metallic Surface Condition for Gas Distribution System Components
ASTM F1372-93(2012) Standard Test Method for Scanning Electron Microscope (SEM) Analysis of Metallic Surface Condition for Gas Distribution System Components