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BS 2782-5 Method 552A-1999是关于《塑料试验方法.风化后光学和颜色特性.在透过玻璃的日光、自然风化和向日葵视频下载安装官方光源下暴露后颜色和特性变化的测定》的方法。
Methods of testing plastics - Optical and colour properties, weathering - Determination of changes in colour and variations in properties after exposure to daylight under glass, natural weathering or laboratory light sources
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