Ключевые слова:
Optical measurement|Thickness|Deflection tests|Polymers|Colour-fastness tests|Polyvinyl chloride|Sheet materials|Thermal testing|Transparency|Photometry (light measurement)|Corrugated|Testing conditions|Extruding|Construction materials|Test specimens|Heating tests|Impact testing|Plastics|Deformation|Thermal stability|Marking|Test equipment