جهاز قياس مستوى اللمعان Glossmeter

• بواسطة : Abdul-Majid Elgendy
• التعليقات (0)
• فبراير 14, 2019

A glossmeter (also gloss meter) is an instrument which is used to measure the specular reflection (gloss) of a surface. Gloss is determined by projecting a beam of light at a fixed...