General methods of test for pigments and extenders; Part 16: Determination of relative tinting strength (or equivalent colouring value) and colour on reduction of coloured pigments; Visual comparison method是什么意思_General methods of test for pigments and extenders; Part 16: Determination of relative tinting strength (or equivalent colouring value) and colour on reduction of coloured pigments; Visual comparison method在线翻译_英语_读音_用法_例句